diff options
Diffstat (limited to 'src/H5FDmpio.c')
-rw-r--r-- | src/H5FDmpio.c | 766 |
1 files changed, 276 insertions, 490 deletions
diff --git a/src/H5FDmpio.c b/src/H5FDmpio.c index b086aab..07ad184 100644 --- a/src/H5FDmpio.c +++ b/src/H5FDmpio.c @@ -12,24 +12,24 @@ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ /* - * Programmer: Robb Matzke <matzke@llnl.gov> + * Programmer: Robb Matzke * Thursday, July 29, 1999 * - * Purpose: This is the MPI-2 I/O driver. + * Purpose: This is the MPI-2 I/O driver. * */ /* Interface initialization */ #define H5_INTERFACE_INIT_FUNC H5FD_mpio_init_interface -#include "H5private.h" /* Generic Functions */ -#include "H5Dprivate.h" /* Dataset functions */ -#include "H5Eprivate.h" /* Error handling */ -#include "H5Fprivate.h" /* File access */ -#include "H5FDprivate.h" /* File drivers */ -#include "H5FDmpi.h" /* MPI-based file drivers */ -#include "H5Iprivate.h" /* IDs */ -#include "H5MMprivate.h" /* Memory management */ +#include "H5private.h" /* Generic Functions */ +#include "H5Dprivate.h" /* Dataset functions */ +#include "H5Eprivate.h" /* Error handling */ +#include "H5Fprivate.h" /* File access */ +#include "H5FDprivate.h" /* File drivers */ +#include "H5FDmpi.h" /* MPI-based file drivers */ +#include "H5Iprivate.h" /* IDs */ +#include "H5MMprivate.h" /* Memory management */ #include "H5Pprivate.h" /* Property lists */ #ifdef H5_HAVE_PARALLEL @@ -180,13 +180,13 @@ H5FD_mpio_init_interface(void) } /* H5FD_mpio_init_interface() */ /*------------------------------------------------------------------------- - * Function: H5FD_mpio_init + * Function: H5FD_mpio_init * - * Purpose: Initialize this driver by registering the driver with the - * library. + * Purpose: Initialize this driver by registering the driver with the + * library. * - * Return: Success: The driver ID for the mpio driver. - * Failure: Negative. + * Return: Success: The driver ID for the mpio driver + * Failure: H5I_INVALID_HID * * Programmer: Robb Matzke * Thursday, August 5, 1999 @@ -198,11 +198,11 @@ H5FD_mpio_init(void) { #ifdef H5FDmpio_DEBUG static int H5FD_mpio_Debug_inited = 0; -#endif /* H5FDmpio_DEBUG */ - const char *s; /* String for environment variables */ - hid_t ret_value; /* Return value */ +#endif /* H5FDmpio_DEBUG */ + const char *s; /* String for environment variables */ + hid_t ret_value = H5I_INVALID_HID; /* Return value */ - FUNC_ENTER_NOAPI(FAIL) + FUNC_ENTER_NOAPI(H5I_INVALID_HID) /* Register the MPI-IO VFD, if it isn't already */ if (H5I_VFL != H5I_get_type(H5FD_MPIO_g)) @@ -236,17 +236,15 @@ done: } /* end H5FD_mpio_init() */ /*--------------------------------------------------------------------------- - * Function: H5FD_mpio_term + * Function: H5FD_mpio_term * - * Purpose: Shut down the VFD + * Purpose: Shut down the VFD * * Return: <none> * * Programmer: Quincey Koziol * Friday, Jan 30, 2004 * - * Modification: - * *--------------------------------------------------------------------------- */ void @@ -261,61 +259,33 @@ H5FD_mpio_term(void) } /* end H5FD_mpio_term() */ /*------------------------------------------------------------------------- - * Function: H5Pset_fapl_mpio + * Function: H5Pset_fapl_mpio * - * Purpose: Store the user supplied MPIO communicator comm and info in - * the file access property list FAPL_ID which can then be used - * to create and/or open the file. This function is available - * only in the parallel HDF5 library and is not collective. + * Purpose: Store the user supplied MPIO communicator comm and info in + * the file access property list FAPL_ID which can then be used + * to create and/or open the file. This function is available + * only in the parallel HDF5 library and is not collective. * - * comm is the MPI communicator to be used for file open as - * defined in MPI_FILE_OPEN of MPI-2. This function makes a - * duplicate of comm. Any modification to comm after this function - * call returns has no effect on the access property list. + * comm is the MPI communicator to be used for file open as + * defined in MPI_FILE_OPEN of MPI-2. This function makes a + * duplicate of comm. Any modification to comm after this function + * call returns has no effect on the access property list. * - * info is the MPI Info object to be used for file open as - * defined in MPI_FILE_OPEN of MPI-2. This function makes a - * duplicate of info. Any modification to info after this - * function call returns has no effect on the access property - * list. + * info is the MPI Info object to be used for file open as + * defined in MPI_FILE_OPEN of MPI-2. This function makes a + * duplicate of info. Any modification to info after this + * function call returns has no effect on the access property + * list. * * If fapl_id has previously set comm and info values, they * will be replaced and the old communicator and Info object * are freed. * - * Return: Success: Non-negative - * - * Failure: Negative + * Return: Success: Non-negative + * Failure: Negative * * Programmer: Albert Cheng - * Feb 3, 1998 - * - * Modifications: - * Robb Matzke, 1998-02-18 - * Check all arguments before the property list is updated so we - * don't leave the property list in a bad state if something - * goes wrong. Also, the property list data type changed to - * allow more generality so all the mpi-related stuff is in the - * `u.mpi' member. The `access_mode' will contain only - * mpi-related flags defined in H5Fpublic.h. - * - * Albert Cheng, 1998-04-16 - * Removed the ACCESS_MODE argument. The access mode is changed - * to be controlled by data transfer property list during data - * read/write calls. - * - * Robb Matzke, 1999-08-06 - * Modified to work with the virtual file layer. - * - * Raymond Lu, 2001-10-23 - * Changed the file access list to the new generic property - * list. - * - * Albert Cheng, 2003-04-17 - * Modified the description of the function that it now stores - * a duplicate of the communicator and INFO object. Free the - * old duplicates if previously set. (Work is actually done - * by H5P_set_driver.) + * Feb 3, 1998 * *------------------------------------------------------------------------- */ @@ -329,10 +299,9 @@ H5Pset_fapl_mpio(hid_t fapl_id, MPI_Comm comm, MPI_Info info) FUNC_ENTER_API(FAIL) H5TRACE3("e", "iMcMi", fapl_id, comm, info); + /* Check arguments */ if (fapl_id == H5P_DEFAULT) HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "can't set values in default property list") - - /* Check arguments */ if (NULL == (plist = H5P_object_verify(fapl_id, H5P_FILE_ACCESS))) HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a file access list") if (MPI_COMM_NULL == comm) @@ -347,43 +316,28 @@ H5Pset_fapl_mpio(hid_t fapl_id, MPI_Comm comm, MPI_Info info) done: FUNC_LEAVE_API(ret_value) -} +} /* H5Pset_fapl_mpio() */ /*------------------------------------------------------------------------- - * Function: H5Pget_fapl_mpio - * - * Purpose: If the file access property list is set to the H5FD_MPIO - * driver then this function returns duplicates of the MPI - * communicator and Info object stored through the comm and - * info pointers. It is the responsibility of the application - * to free the returned communicator and Info object. - * - * Return: Success: Non-negative with the communicator and - * Info object returned through the comm and - * info arguments if non-null. Since they are - * duplicates of the stored objects, future - * modifications to the access property list do - * not affect them and it is the responsibility - * of the application to free them. - * - * Failure: Negative + * Function: H5Pget_fapl_mpio + * + * Purpose: If the file access property list is set to the H5FD_MPIO + * driver then this function returns duplicates of the MPI + * communicator and Info object stored through the comm and + * info pointers. It is the responsibility of the application + * to free the returned communicator and Info object. + * + * Return: Success: Non-negative with the communicator and + * Info object returned through the comm and + * info arguments if non-null. Since they are + * duplicates of the stored objects, future + * modifications to the access property list do + * not affect them and it is the responsibility + * of the application to free them. + * Failure: Negative * * Programmer: Robb Matzke - * Thursday, February 26, 1998 - * - * Modifications: - * - * Albert Cheng, Apr 16, 1998 - * Removed the access_mode argument. The access_mode is changed - * to be controlled by data transfer property list during data - * read/write calls. - * - * Raymond Lu, 2001-10-23 - * Changed the file access list to the new generic property - * list. - * - * Albert Cheng, 2003-04-17 - * Return duplicates of the stored communicator and Info object. + * Thursday, February 26, 1998 * *------------------------------------------------------------------------- */ @@ -419,44 +373,46 @@ H5Pget_fapl_mpio(hid_t fapl_id, MPI_Comm *comm /*out*/, MPI_Info *info /*out*/) if (MPI_INFO_NULL != fa->info) { if (MPI_SUCCESS != (mpi_code = MPI_Info_dup(fa->info, info))) HMPI_GOTO_ERROR(FAIL, "MPI_Info_dup failed", mpi_code) - } - else { + } /* end if */ + else /* do not dup it */ *info = MPI_INFO_NULL; - } - } + } /* end if */ + /* Store the copied communicator, now that the Info object has been + * successfully copied. + */ if (comm) *comm = comm_tmp; done: - if (FAIL == ret_value) { + if (ret_value < 0) /* need to free anything created here */ if (comm_tmp != MPI_COMM_NULL) MPI_Comm_free(&comm_tmp); - } + FUNC_LEAVE_API(ret_value) -} +} /* end H5Pget_fapl_mpio() */ /*------------------------------------------------------------------------- - * Function: H5Pset_dxpl_mpio + * Function: H5Pset_dxpl_mpio * - * Purpose: Set the data transfer property list DXPL_ID to use transfer - * mode XFER_MODE. The property list can then be used to control - * the I/O transfer mode during data I/O operations. The valid - * transfer modes are: + * Purpose: Set the data transfer property list DXPL_ID to use transfer + * mode XFER_MODE. The property list can then be used to control + * the I/O transfer mode during data I/O operations. The valid + * transfer modes are: * - * H5FD_MPIO_INDEPENDENT: - * Use independent I/O access (the default). + * H5FD_MPIO_INDEPENDENT: + * Use independent I/O access (the default). * - * H5FD_MPIO_COLLECTIVE: - * Use collective I/O access. + * H5FD_MPIO_COLLECTIVE: + * Use collective I/O access. * - * Return: Success: Non-negative - * Failure: Negative + * Return: Success: Non-negative + * Failure: Negative * * Programmer: Albert Cheng - * April 2, 1998 + * April 2, 1998 * *------------------------------------------------------------------------- */ @@ -469,10 +425,9 @@ H5Pset_dxpl_mpio(hid_t dxpl_id, H5FD_mpio_xfer_t xfer_mode) FUNC_ENTER_API(FAIL) H5TRACE2("e", "iDt", dxpl_id, xfer_mode); + /* Check arguments */ if (dxpl_id == H5P_DEFAULT) HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "can't set values in default property list") - - /* Check arguments */ if (NULL == (plist = H5P_object_verify(dxpl_id, H5P_DATASET_XFER))) HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a dxpl") if (H5FD_MPIO_INDEPENDENT != xfer_mode && H5FD_MPIO_COLLECTIVE != xfer_mode) @@ -487,19 +442,18 @@ done: } /* end H5Pset_dxpl_mpio() */ /*------------------------------------------------------------------------- - * Function: H5Pget_dxpl_mpio + * Function: H5Pget_dxpl_mpio * - * Purpose: Queries the transfer mode current set in the data transfer - * property list DXPL_ID. This is not collective. + * Purpose: Queries the transfer mode current set in the data transfer + * property list DXPL_ID. This is not collective. * - * Return: Success: Non-negative, with the transfer mode returned - * through the XFER_MODE argument if it is - * non-null. - * - * Failure: Negative + * Return: Success: Non-negative, with the transfer mode returned + * through the XFER_MODE argument if it is + * non-null. + * Failure: Negative * * Programmer: Albert Cheng - * April 2, 1998 + * April 2, 1998 * *------------------------------------------------------------------------- */ @@ -512,6 +466,7 @@ H5Pget_dxpl_mpio(hid_t dxpl_id, H5FD_mpio_xfer_t *xfer_mode /*out*/) FUNC_ENTER_API(FAIL) H5TRACE2("e", "ix", dxpl_id, xfer_mode); + /* Check arguments */ if (NULL == (plist = H5P_object_verify(dxpl_id, H5P_DATASET_XFER))) HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a dxpl") @@ -525,21 +480,20 @@ done: } /* end H5Pget_dxpl_mpio() */ /*------------------------------------------------------------------------- - * Function: H5Pset_dxpl_mpio_collective_opt + * Function: H5Pset_dxpl_mpio_collective_opt * - * Purpose: To set a flag to choose linked chunk I/O or multi-chunk I/O - * without involving decision-making inside HDF5 + * Purpose: To set a flag to choose linked chunk I/O or multi-chunk I/O + * without involving decision-making inside HDF5 * - * Note: The library will do linked chunk I/O or multi-chunk I/O without - * involving communications for decision-making process. - * The library won't behave as it asks for only when we find - * that the low-level MPI-IO package doesn't support this. + * Note: The library will do linked chunk I/O or multi-chunk I/O without + * involving communications for decision-making process. + * The library won't behave as it asks for only when we find + * that the low-level MPI-IO package doesn't support this. * - * Return: Success: Non-negative - * Failure: Negative + * Return: Success: Non-negative + * Failure: Negative * - * Programmer: Kent Yang - * ? ?, ? + * Programmer: Kent Yang * *------------------------------------------------------------------------- */ @@ -552,10 +506,9 @@ H5Pset_dxpl_mpio_collective_opt(hid_t dxpl_id, H5FD_mpio_collective_opt_t opt_mo FUNC_ENTER_API(FAIL) H5TRACE2("e", "iDc", dxpl_id, opt_mode); + /* Check arguments */ if (dxpl_id == H5P_DEFAULT) HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "can't set values in default property list") - - /* Check arguments */ if (NULL == (plist = H5P_object_verify(dxpl_id, H5P_DATASET_XFER))) HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a dxpl") @@ -568,21 +521,20 @@ done: } /* end H5Pset_dxpl_mpio_collective_opt() */ /*------------------------------------------------------------------------- - * Function: H5Pset_dxpl_mpio_chunk_opt + * Function: H5Pset_dxpl_mpio_chunk_opt * - * Purpose: To set a flag to choose linked chunk I/O or multi-chunk I/O - * without involving decision-making inside HDF5 + * Purpose: To set a flag to choose linked chunk I/O or multi-chunk I/O + * without involving decision-making inside HDF5 * - * Note: The library will do linked chunk I/O or multi-chunk I/O without - * involving communications for decision-making process. - * The library won't behave as it asks for only when we find - * that the low-level MPI-IO package doesn't support this. + * Note: The library will do linked chunk I/O or multi-chunk I/O without + * involving communications for decision-making process. + * The library won't behave as it asks for only when we find + * that the low-level MPI-IO package doesn't support this. * - * Return: Success: Non-negative - * Failure: Negative + * Return: Success: Non-negative + * Failure: Negative * - * Programmer: Kent Yang - * ? ?, ? + * Programmer: Kent Yang * *------------------------------------------------------------------------- */ @@ -595,10 +547,9 @@ H5Pset_dxpl_mpio_chunk_opt(hid_t dxpl_id, H5FD_mpio_chunk_opt_t opt_mode) FUNC_ENTER_API(FAIL) H5TRACE2("e", "iDh", dxpl_id, opt_mode); + /* Check arguments */ if (dxpl_id == H5P_DEFAULT) HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "can't set values in default property list") - - /* Check arguments */ if (NULL == (plist = H5P_object_verify(dxpl_id, H5P_DATASET_XFER))) HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a dxpl") @@ -611,19 +562,18 @@ done: } /* end H5Pset_dxpl_mpio_chunk_opt() */ /*------------------------------------------------------------------------- - * Function: H5Pset_dxpl_mpio_chunk_opt_num + * Function: H5Pset_dxpl_mpio_chunk_opt_num * - * Purpose: To set a threshold for doing linked chunk IO + * Purpose: To set a threshold for doing linked chunk IO * - * Note: If the number is greater than the threshold set by the user, - * the library will do linked chunk I/O; otherwise, I/O will be - * done for every chunk. + * Note: If the number is greater than the threshold set by the user, + * the library will do linked chunk I/O; otherwise, I/O will be + * done for every chunk. * - * Return: Success: Non-negative - * Failure: Negative + * Return: Success: Non-negative + * Failure: Negative * - * Programmer: Kent Yang - * ? ?, ? + * Programmer: Kent Yang * *------------------------------------------------------------------------- */ @@ -636,10 +586,9 @@ H5Pset_dxpl_mpio_chunk_opt_num(hid_t dxpl_id, unsigned num_chunk_per_proc) FUNC_ENTER_API(FAIL) H5TRACE2("e", "iIu", dxpl_id, num_chunk_per_proc); + /* Check arguments */ if (dxpl_id == H5P_DEFAULT) HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "can't set values in default property list") - - /* Check arguments */ if (NULL == (plist = H5P_object_verify(dxpl_id, H5P_DATASET_XFER))) HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a dxpl") @@ -652,22 +601,21 @@ done: } /* end H5Pset_dxpl_mpio_chunk_opt_num() */ /*------------------------------------------------------------------------- - * Function: H5Pset_dxpl_mpio_chunk_opt_ratio + * Function: H5Pset_dxpl_mpio_chunk_opt_ratio * - * Purpose: To set a threshold for doing collective I/O for each chunk + * Purpose: To set a threshold for doing collective I/O for each chunk * - * Note: The library will calculate the percentage of the number of - * process holding selections at each chunk. If that percentage - * of number of process in the individual chunk is greater than - * the threshold set by the user, the library will do collective - * chunk I/O for this chunk; otherwise, independent I/O will be - * done for this chunk. + * Note: The library will calculate the percentage of the number of + * process holding selections at each chunk. If that percentage + * of number of process in the individual chunk is greater than + * the threshold set by the user, the library will do collective + * chunk I/O for this chunk; otherwise, independent I/O will be + * done for this chunk. * - * Return: Success: Non-negative - * Failure: Negative + * Return: Success: Non-negative + * Failure: Negative * - * Programmer: Kent Yang - * ? ?, ? + * Programmer: Kent Yang * *------------------------------------------------------------------------- */ @@ -680,10 +628,9 @@ H5Pset_dxpl_mpio_chunk_opt_ratio(hid_t dxpl_id, unsigned percent_num_proc_per_ch FUNC_ENTER_API(FAIL) H5TRACE2("e", "iIu", dxpl_id, percent_num_proc_per_chunk); + /* Check arguments */ if (dxpl_id == H5P_DEFAULT) HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "can't set values in default property list") - - /* Check arguments */ if (NULL == (plist = H5P_object_verify(dxpl_id, H5P_DATASET_XFER))) HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a dxpl") @@ -696,17 +643,17 @@ done: } /* end H5Pset_dxpl_mpio_chunk_opt_ratio() */ /*------------------------------------------------------------------------- - * Function: H5FD_mpio_fapl_get + * Function: H5FD_mpio_fapl_get * - * Purpose: Returns a file access property list which could be used to - * create another file the same as this one. + * Purpose: Returns a file access property list which could be used to + * create another file the same as this one. * - * Return: Success: Ptr to new file access property list with all - * fields copied from the file pointer. + * Return: Success: Ptr to new file access property list with all + * fields copied from the file pointer. * - * Failure: NULL + * Failure: NULL * - * Programmer: Robb Matzke + * Programmer: Robb Matzke * Friday, August 13, 1999 * *------------------------------------------------------------------------- @@ -738,15 +685,15 @@ done: } /*------------------------------------------------------------------------- - * Function: H5FD_mpio_fapl_copy + * Function: H5FD_mpio_fapl_copy * - * Purpose: Copies the mpio-specific file access properties. + * Purpose: Copies the mpio-specific file access properties. * - * Return: Success: Ptr to a new property list + * Return: Success: Ptr to a new property list * - * Failure: NULL + * Failure: NULL * - * Programmer: Albert Cheng + * Programmer: Albert Cheng * Jan 8, 2003 * *------------------------------------------------------------------------- @@ -790,19 +737,17 @@ done: } /* end H5FD_mpio_fapl_copy() */ /*------------------------------------------------------------------------- - * Function: H5FD_mpio_fapl_free + * Function: H5FD_mpio_fapl_free * - * Purpose: Frees the mpio-specific file access properties. + * Purpose: Frees the mpio-specific file access properties. * - * Return: Success: 0 + * Return: Success: 0 * - * Failure: -1 + * Failure: -1 * - * Programmer: Albert Cheng + * Programmer: Albert Cheng * Jan 8, 2003 * - * Modifications: - * *------------------------------------------------------------------------- */ static herr_t @@ -831,16 +776,14 @@ H5FD_mpio_fapl_free(void *_fa) } /* end H5FD_mpio_fapl_free() */ /*------------------------------------------------------------------------- - * Function: H5FD_set_mpio_atomicity + * Function: H5FD_set_mpio_atomicity * - * Purpose: Sets the atomicity mode + * Purpose: Sets the atomicity mode * - * Return: Success: Non-negative + * Return: SUCCEED/FAIL * - * Failure: Negative - * - * Programmer: Mohamad Chaarawi - * Feb 14, 2012 + * Programmer: Mohamad Chaarawi + * Feb 14, 2012 * *------------------------------------------------------------------------- */ @@ -856,7 +799,7 @@ H5FD_set_mpio_atomicity(H5FD_t *_file, hbool_t flag) #ifdef H5FDmpio_DEBUG if (H5FD_mpio_Debug[(int)'t']) - HDfprintf(stdout, "Entering H5FD_set_mpio_atomicity\n"); + HDfprintf(stdout, "%s: Entering\n", FUNC); #endif if (FALSE == flag) @@ -871,22 +814,21 @@ H5FD_set_mpio_atomicity(H5FD_t *_file, hbool_t flag) done: #ifdef H5FDmpio_DEBUG if (H5FD_mpio_Debug[(int)'t']) - HDfprintf(stdout, "Leaving H5FD_set_mpio_atomicity\n"); + HDfprintf(stdout, "%s: Leaving\n", FUNC); #endif + FUNC_LEAVE_NOAPI(ret_value) -} +} /* end H5FD_set_mpio_atomicity() */ /*------------------------------------------------------------------------- - * Function: H5FD_get_mpio_atomicity + * Function: H5FD_get_mpio_atomicity * - * Purpose: Returns the atomicity mode + * Purpose: Returns the atomicity mode * - * Return: Success: Non-negative + * Return: SUCCEED/FAIL * - * Failure: Negative - * - * Programmer: Mohamad Chaarawi - * Feb 14, 2012 + * Programmer: Mohamad Chaarawi + * Feb 14, 2012 * *------------------------------------------------------------------------- */ @@ -902,10 +844,10 @@ H5FD_get_mpio_atomicity(H5FD_t *_file, hbool_t *flag) #ifdef H5FDmpio_DEBUG if (H5FD_mpio_Debug[(int)'t']) - HDfprintf(stdout, "Entering H5FD_get_mpio_atomicity\n"); + HDfprintf(stdout, "%s: Entering\n", FUNC); #endif - /* get atomicity value */ + /* Get atomicity value */ if (MPI_SUCCESS != (mpi_code = MPI_File_get_atomicity(file->f, &temp_flag))) HMPI_GOTO_ERROR(FAIL, "MPI_File_get_atomicity", mpi_code) @@ -917,54 +859,28 @@ H5FD_get_mpio_atomicity(H5FD_t *_file, hbool_t *flag) done: #ifdef H5FDmpio_DEBUG if (H5FD_mpio_Debug[(int)'t']) - HDfprintf(stdout, "Leaving H5FD_get_mpio_atomicity\n"); + HDfprintf(stdout, "%s: Leaving\n", FUNC); #endif + FUNC_LEAVE_NOAPI(ret_value) -} +} /* end H5FD_get_mpio_atomicity() */ /*------------------------------------------------------------------------- * Function: H5FD_mpio_open * * Purpose: Opens a file with name NAME. The FLAGS are a bit field with - * purpose similar to the second argument of open(2) and which - * are defined in H5Fpublic.h. The file access property list - * FAPL_ID contains the properties driver properties and MAXADDR - * is the largest address which this file will be expected to - * access. This is collective. + * purpose similar to the second argument of open(2) and which + * are defined in H5Fpublic.h. The file access property list + * FAPL_ID contains the properties driver properties and MAXADDR + * is the largest address which this file will be expected to + * access. This is collective. * - * Return: Success: A new file pointer. + * Return: Success: A new file pointer + * Failure: NULL * - * Failure: NULL - * - * Programmer: + * Programmer: Robert Kim Yates * January 30, 1998 * - * Modifications: - * Robb Matzke, 1998-02-18 - * Added the ACCESS_PARMS argument. Moved some error checking - * here from elsewhere. - * - * rky, 1998-01-11 - * Added H5FD_mpio_Debug debug flags controlled by MPI_Info. - * - * rky, 1998-08-28 - * Init flag controlling redundant metadata writes to disk. - * - * rky, 1998-12-07 - * Added barrier after MPI_File_set_size to prevent race - * condition -- subsequent writes were being truncated, causing - * holes in file. - * - * Robb Matzke, 1999-08-06 - * Modified to work with the virtual file layer. - * - * rky & ppw, 1999-11-07 - * Modified "H5FD_mpio_open" so that file-truncation is - * avoided for brand-new files (with zero filesize). - * - * Albert Cheng, 2003-04-17 - * Duplicate the communicator and Info object so that file is - * insulated from the old one. *------------------------------------------------------------------------- */ static H5FD_t * @@ -996,25 +912,25 @@ H5FD_mpio_open(const char *name, unsigned flags, hid_t fapl_id, haddr_t H5_ATTR_ } #endif - /* Obtain a pointer to mpio-specific file access properties */ + /* Get a pointer to the fapl */ if (NULL == (plist = H5P_object_verify(fapl_id, H5P_FILE_ACCESS))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not a file access property list") if (H5P_FILE_ACCESS_DEFAULT == fapl_id || H5FD_MPIO != H5P_get_driver(plist)) { _fa.comm = MPI_COMM_SELF; /*default*/ _fa.info = MPI_INFO_NULL; /*default*/ fa = &_fa; - } + } /* end if */ else { if (NULL == (fa = (const H5FD_mpio_fapl_t *)H5P_get_driver_info(plist))) HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, NULL, "bad VFL driver info") - } + } /* end else */ /* Duplicate communicator and Info object for use by this file. */ if (FAIL == H5FD_mpi_comm_info_dup(fa->comm, fa->info, &comm_dup, &info_dup)) HGOTO_ERROR(H5E_INTERNAL, H5E_CANTCOPY, NULL, "Communicator/Info duplicate failed") - /* convert HDF5 flags to MPI-IO flags */ - /* some combinations are illegal; let MPI-IO figure it out */ + /* Convert HDF5 flags to MPI-IO flags */ + /* Some combinations are illegal; let MPI-IO figure it out */ mpi_amode = (flags & H5F_ACC_RDWR) ? MPI_MODE_RDWR : MPI_MODE_RDONLY; if (flags & H5F_ACC_CREAT) mpi_amode |= MPI_MODE_CREATE; @@ -1100,32 +1016,22 @@ done: #ifdef H5FDmpio_DEBUG if (H5FD_mpio_Debug[(int)'t']) - HDfprintf(stdout, "Leaving H5FD_mpio_open\n"); + HDfprintf(stdout, "%s: Leaving\n", FUNC); #endif + FUNC_LEAVE_NOAPI(ret_value) -} +} /* end H5FD_mpio_open() */ /*------------------------------------------------------------------------- * Function: H5FD_mpio_close * * Purpose: Closes a file. This is collective. * - * Return: Success: Non-negative - * - * Failure: Negative + * Return: SUCCEED/FAIL * * Programmer: Unknown * January 30, 1998 * - * Modifications: - * Robb Matzke, 1998-02-18 - * Added the ACCESS_PARMS argument. - * - * Robb Matzke, 1999-08-06 - * Modified to work with the virtual file layer. - * - * Albert Cheng, 2003-04-17 - * Free the communicator stored. *------------------------------------------------------------------------- */ static herr_t @@ -1139,8 +1045,10 @@ H5FD_mpio_close(H5FD_t *_file) #ifdef H5FDmpio_DEBUG if (H5FD_mpio_Debug[(int)'t']) - HDfprintf(stdout, "Entering H5FD_mpio_close\n"); + HDfprintf(stdout, "%s: Entering\n", FUNC); #endif + + /* Sanity checks */ HDassert(file); HDassert(H5FD_MPIO == file->pub.driver_id); @@ -1155,33 +1063,23 @@ H5FD_mpio_close(H5FD_t *_file) done: #ifdef H5FDmpio_DEBUG if (H5FD_mpio_Debug[(int)'t']) - HDfprintf(stdout, "Leaving H5FD_mpio_close\n"); + HDfprintf(stdout, "%s: Leaving\n", FUNC); #endif + FUNC_LEAVE_NOAPI(ret_value) -} +} /* end H5FD_mpio_close() */ /*------------------------------------------------------------------------- - * Function: H5FD_mpio_query + * Function: H5FD_mpio_query * - * Purpose: Set the flags that this VFL driver is capable of supporting. + * Purpose: Set the flags that this VFL driver is capable of supporting. * (listed in H5FDpublic.h) * - * Return: Success: non-negative - * - * Failure: negative + * Return: SUCCEED/FAIL * * Programmer: Quincey Koziol * Friday, August 25, 2000 * - * Modifications: - * - * John Mainzer -- 9/21/05 - * Modified code to turn off the - * H5FD_FEAT_ACCUMULATE_METADATA_WRITE flag. - * With the movement of - * all cache writes to process 0, this flag has become - * problematic in PHDF5. - * *------------------------------------------------------------------------- */ static herr_t @@ -1199,27 +1097,21 @@ H5FD_mpio_query(const H5FD_t H5_ATTR_UNUSED *_file, unsigned long *flags /* out } /* end if */ FUNC_LEAVE_NOAPI(SUCCEED) -} +} /* end H5FD_mpio_query() */ /*------------------------------------------------------------------------- - * Function: H5FD_mpio_get_eoa + * Function: H5FD_mpio_get_eoa * - * Purpose: Gets the end-of-address marker for the file. The EOA marker - * is the first address past the last byte allocated in the - * format address space. + * Purpose: Gets the end-of-address marker for the file. The EOA marker + * is the first address past the last byte allocated in the + * format address space. * - * Return: Success: The end-of-address marker. - * - * Failure: HADDR_UNDEF + * Return: Success: The end-of-address marker + * Failure: HADDR_UNDEF * * Programmer: Robb Matzke * Friday, August 6, 1999 * - * Modifications: - * Raymond Lu - * 21 Dec. 2006 - * Added the parameter TYPE. It's only used for MULTI driver. - * *------------------------------------------------------------------------- */ static haddr_t @@ -1229,31 +1121,25 @@ H5FD_mpio_get_eoa(const H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type) FUNC_ENTER_NOAPI_NOINIT_NOERR + /* Sanity checks */ HDassert(file); HDassert(H5FD_MPIO == file->pub.driver_id); FUNC_LEAVE_NOAPI(file->eoa) -} +} /* end H5FD_mpio_get_eoa() */ /*------------------------------------------------------------------------- - * Function: H5FD_mpio_set_eoa - * - * Purpose: Set the end-of-address marker for the file. This function is - * called shortly after an existing HDF5 file is opened in order - * to tell the driver where the end of the HDF5 data is located. + * Function: H5FD_mpio_set_eoa * - * Return: Success: 0 + * Purpose: Set the end-of-address marker for the file. This function is + * called shortly after an existing HDF5 file is opened in order + * to tell the driver where the end of the HDF5 data is located. * - * Failure: -1 + * Return: SUCCEED/FAIL * * Programmer: Robb Matzke * Friday, August 6, 1999 * - * Modifications: - * Raymond Lu - * 21 Dec. 2006 - * Added the parameter TYPE. It's only used for MULTI driver. - * *------------------------------------------------------------------------- */ static herr_t @@ -1263,41 +1149,39 @@ H5FD_mpio_set_eoa(H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type, haddr_t addr) FUNC_ENTER_NOAPI_NOINIT_NOERR + /* Sanity checks */ HDassert(file); HDassert(H5FD_MPIO == file->pub.driver_id); file->eoa = addr; FUNC_LEAVE_NOAPI(SUCCEED) -} +} /* end H5FD_mpio_set_eoa() */ /*------------------------------------------------------------------------- - * Function: H5FD_mpio_get_eof + * Function: H5FD_mpio_get_eof * - * Purpose: Gets the end-of-file marker for the file. The EOF marker - * is the real size of the file. + * Purpose: Gets the end-of-file marker for the file. The EOF marker + * is the real size of the file. * - * The MPIO driver doesn't bother keeping this field updated - * since that's a relatively expensive operation. Fortunately - * the library only needs the EOF just after the file is opened - * in order to determine whether the file is empty, truncated, - * or okay. Therefore, any MPIO I/O function will set its value - * to HADDR_UNDEF which is the error return value of this - * function. + * The MPIO driver doesn't bother keeping this field updated + * since that's a relatively expensive operation. Fortunately + * the library only needs the EOF just after the file is opened + * in order to determine whether the file is empty, truncated, + * or okay. Therefore, any MPIO I/O function will set its value + * to HADDR_UNDEF which is the error return value of this + * function. * * Keeping the EOF updated (during write calls) is expensive * because any process may extend the physical end of the * file. -QAK * - * Return: Success: The end-of-address marker. - * - * Failure: HADDR_UNDEF + * Return: Success: The end-of-file marker + * Failure: HADDR_UNDEF * * Programmer: Robb Matzke * Friday, August 6, 1999 * - * Modifications: - * *------------------------------------------------------------------------- */ static haddr_t @@ -1307,24 +1191,23 @@ H5FD_mpio_get_eof(const H5FD_t *_file) FUNC_ENTER_NOAPI_NOINIT_NOERR + /* Sanity checks */ HDassert(file); HDassert(H5FD_MPIO == file->pub.driver_id); FUNC_LEAVE_NOAPI(file->eof) -} +} /* end H5FD_mpio_get_eof() */ /*------------------------------------------------------------------------- * Function: H5FD_mpio_get_handle * * Purpose: Returns the file handle of MPIO file driver. * - * Returns: Non-negative if succeed or negative if fails. + * Returns: SUCCEED/FAIL * * Programmer: Raymond Lu * Sept. 16, 2002 * - * Modifications: - * *------------------------------------------------------------------------- */ static herr_t @@ -1342,7 +1225,7 @@ H5FD_mpio_get_handle(H5FD_t *_file, hid_t H5_ATTR_UNUSED fapl, void **file_handl done: FUNC_LEAVE_NOAPI(ret_value) -} +} /* end H5FD_mpio_get_handle() */ /*------------------------------------------------------------------------- * Function: H5FD_mpio_read @@ -1434,8 +1317,10 @@ H5FD_mpio_read(H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type, hid_t dxpl_id, had #ifdef H5FDmpio_DEBUG if (H5FD_mpio_Debug[(int)'t']) - HDfprintf(stdout, "Entering H5FD_mpio_read\n"); + HDfprintf(stdout, "%s: Entering\n", FUNC); #endif + + /* Sanity checks */ HDassert(file); HDassert(H5FD_MPIO == file->pub.driver_id); /* Make certain we have the correct type of property list */ @@ -1455,7 +1340,7 @@ H5FD_mpio_read(H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type, hid_t dxpl_id, had #ifdef H5FDmpio_DEBUG if (H5FD_mpio_Debug[(int)'r']) - HDfprintf(stdout, "in H5FD_mpio_read mpi_off=%ld size_i=%d\n", (long)mpi_off, size_i); + HDfprintf(stdout, "%s: mpi_off = %ld size_i = %d\n", FUNC, (long)mpi_off, size_i); #endif /* Only look for MPI views for raw data transfers */ @@ -1578,131 +1463,31 @@ H5FD_mpio_read(H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type, hid_t dxpl_id, had done: #ifdef H5FDmpio_DEBUG if (H5FD_mpio_Debug[(int)'t']) - HDfprintf(stdout, "Leaving H5FD_mpio_read\n"); + HDfprintf(stdout, "%s: Leaving\n", FUNC); #endif FUNC_LEAVE_NOAPI(ret_value) -} +} /* end H5FD_mpio_read() */ /*------------------------------------------------------------------------- - * Function: H5FD_mpio_write - * - * Purpose: Writes SIZE bytes of data to FILE beginning at address ADDR - * from buffer BUF according to data transfer properties in - * DXPL_ID using potentially complex file and buffer types to - * effect the transfer. + * Function: H5FD_mpio_write * - * MPI is able to coalesce requests from different processes - * (collective and independent). + * Purpose: Writes SIZE bytes of data to FILE beginning at address ADDR + * from buffer BUF according to data transfer properties in + * DXPL_ID using potentially complex file and buffer types to + * effect the transfer. * - * Return: Success: Zero. USE_TYPES and OLD_USE_TYPES in the - * access params are altered. + * MPI is able to coalesce requests from different processes + * (collective and independent). * - * Failure: -1, USE_TYPES and OLD_USE_TYPES in the - * access params may be altered. + * Return: Success: SUCCEED. USE_TYPES and OLD_USE_TYPES in the + * access params are altered. + * Failure: FAIL. USE_TYPES and OLD_USE_TYPES in the + * access params may be altered. * - * Programmer: Unknown + * Programmer: Robert Kim Yates * January 30, 1998 * - * Modifications: - * rky, 1998-08-28 - * If the file->allsame flag is set, we assume that all the - * procs in the relevant MPI communicator will write identical - * data at identical offsets in the file, so only proc 0 will - * write, and all other procs will wait for p0 to finish. This - * is useful for writing metadata, for example. Note that we - * don't _check_ that the data is identical. Also, the mechanism - * we use to eliminate the redundant writes is by requiring a - * call to H5FD_mpio_tas_allsame before the write, which is - * rather klugey. Would it be better to pass a parameter to - * low-level writes like H5F_block_write and H5F_low_write, - * instead? Or...??? Also, when I created this mechanism I - * wanted to minimize the difference in behavior between the old - * way of doing things (i.e., all procs write) and the new way, - * so the writes are eliminated at the very lowest level, here - * in H5FD_mpio_write. It may be better to rethink that, and - * short-circuit the writes at a higher level (e.g., at the - * points in the code where H5FD_mpio_tas_allsame is called). - * - * - * Robb Matzke, 1998-02-18 - * Added the ACCESS_PARMS argument. - * - * rky, 1998-04-10 - * Call independent or collective MPI write, based on - * ACCESS_PARMS. - * - * rky, 1998-04-24 - * Removed redundant write from H5FD_mpio_write. - * - * Albert Cheng, 1998-06-01 - * Added XFER_MODE to control independent or collective MPI - * write. - * - * rky, 1998-08-16 - * Use BTYPE, FTYPE, and DISP from access parms. The guts of - * H5FD_mpio_read and H5FD_mpio_write should be replaced by a - * single dual-purpose routine. - * - * rky, 1998-08-28 - * Added ALLSAME parameter to make all but proc 0 skip the - * actual write. - * - * Robb Matzke, 1999-04-21 - * Changed XFER_MODE to XFER_PARMS for all H5FD_*_write() - * callbacks. - * - * Robb Matzke, 1999-07-28 - * The ADDR argument is passed by value. - * - * Robb Matzke, 1999-08-06 - * Modified to work with the virtual file layer. - * - * Albert Cheng, 1999-12-19 - * When only-p0-write-allsame-data, p0 Bcasts the - * ret_value to other processes. This prevents - * a racing condition (that other processes try to - * read the file before p0 finishes writing) and also - * allows all processes to report the same ret_value. - * - * Kim Yates, Pat Weidhaas, 2000-09-26 - * Move block of coding where only p0 writes after the - * MPI_File_set_view call. - * - * Quincey Koziol, 2002-05-10 - * Instead of always writing metadata from process 0, spread the - * burden among all the processes by using a round-robin rotation - * scheme. - * - * Quincey Koziol, 2002-05-10 - * Removed allsame code, keying off the type parameter instead. - * - * Quincey Koziol, 2002-05-14 - * Only call MPI_Get_count if we can use MPI_BYTE for the MPI type - * for the I/O transfer. Someday we might include code to decode - * the MPI type used for more complicated transfers and call - * MPI_Get_count all the time. - * - * Quincey Koziol - 2002/06/17 - * Removed 'disp' parameter from H5FD_mpio_setup routine and use - * the address of the dataset in MPI_File_set_view() calls, as - * necessary. - * - * Quincey Koziol - 2002/06/24 - * Removed "lazy" MPI_File_set_view() calls, since they would fail - * if the first I/O was a collective I/O using MPI derived types - * and the next I/O was an independent I/O. - * - * Quincey Koziol - 2002/07/18 - * Added "block_before_meta_write" dataset transfer flag, which - * is set during writes from a metadata cache flush and indicates - * that all the processes must sync up before (one of them) - * writing metadata. - * - * Quincey Koziol - 2003/10/22-31 - * Restructured code massively, straightening out logic and finally - * getting the bytes_written stuff working. - * *------------------------------------------------------------------------- */ static herr_t @@ -1724,8 +1509,10 @@ H5FD_mpio_write(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, siz #ifdef H5FDmpio_DEBUG if (H5FD_mpio_Debug[(int)'t']) - HDfprintf(stdout, "Entering H5FD_mpio_write\n"); + HDfprintf(stdout, "%s: Entering\n", FUNC); #endif + + /* Sanity checks */ HDassert(file); HDassert(H5FD_MPIO == file->pub.driver_id); /* Make certain we have the correct type of property list */ @@ -1745,7 +1532,7 @@ H5FD_mpio_write(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, siz #ifdef H5FDmpio_DEBUG if (H5FD_mpio_Debug[(int)'w']) - HDfprintf(stdout, "in H5FD_mpio_write mpi_off=%ld size_i=%d\n", (long)mpi_off, size_i); + HDfprintf(stdout, "%s: mpi_off = %ld size_i = %d\n", FUNC, (long)mpi_off, size_i); #endif if (type == H5FD_MEM_DRAW) { @@ -1810,6 +1597,7 @@ H5FD_mpio_write(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, siz if (H5FD_mpio_Debug[(int)'t']) HDfprintf(stdout, "H5FD_mpio_write: using MPIO collective mode\n"); #endif + /* Get the collective_opt property to check whether the application wants to do IO individually. */ HDassert(plist); /* get the transfer mode from the dxpl */ @@ -1871,8 +1659,9 @@ H5FD_mpio_write(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, siz done: #ifdef H5FDmpio_DEBUG if (H5FD_mpio_Debug[(int)'t']) - HDfprintf(stdout, "proc %d: Leaving H5FD_mpio_write with ret_value=%d\n", file->mpi_rank, ret_value); + HDfprintf(stdout, "%s: Leaving, proc %d: ret_value = %d\n", FUNC, file->mpi_rank, ret_value); #endif + FUNC_LEAVE_NOAPI(ret_value) } /* end H5FD_mpio_write() */ @@ -1881,9 +1670,7 @@ done: * * Purpose: Makes sure that all data is on disk. This is collective. * - * Return: Success: Non-negative - * - * Failure: Negative + * Return: SUCCEED/FAIL * * Programmer: Robb Matzke * January 30, 1998 @@ -1901,21 +1688,22 @@ H5FD_mpio_flush(H5FD_t *_file, hid_t H5_ATTR_UNUSED dxpl_id, unsigned closing) #ifdef H5FDmpio_DEBUG if (H5FD_mpio_Debug[(int)'t']) - HDfprintf(stdout, "Entering %s\n", FUNC); + HDfprintf(stdout, "%s: Entering\n", FUNC); #endif + + /* Sanity checks */ HDassert(file); HDassert(H5FD_MPIO == file->pub.driver_id); /* Only sync the file if we are not going to immediately close it */ - if (!closing) { + if (!closing) if (MPI_SUCCESS != (mpi_code = MPI_File_sync(file->f))) HMPI_GOTO_ERROR(FAIL, "MPI_File_sync failed", mpi_code) - } /* end if */ done: #ifdef H5FDmpio_DEBUG if (H5FD_mpio_Debug[(int)'t']) - HDfprintf(stdout, "Leaving %s\n", FUNC); + HDfprintf(stdout, "%s: Leaving\n", FUNC); #endif FUNC_LEAVE_NOAPI(ret_value) @@ -1944,8 +1732,10 @@ H5FD_mpio_truncate(H5FD_t *_file, hid_t H5_ATTR_UNUSED dxpl_id, hbool_t H5_ATTR_ #ifdef H5FDmpio_DEBUG if (H5FD_mpio_Debug[(int)'t']) - HDfprintf(stdout, "Entering %s\n", FUNC); + HDfprintf(stdout, "%s: Entering\n", FUNC); #endif + + /* Sanity checks */ HDassert(file); HDassert(H5FD_MPIO == file->pub.driver_id); @@ -1980,25 +1770,23 @@ H5FD_mpio_truncate(H5FD_t *_file, hid_t H5_ATTR_UNUSED dxpl_id, hbool_t H5_ATTR_ done: #ifdef H5FDmpio_DEBUG if (H5FD_mpio_Debug[(int)'t']) - HDfprintf(stdout, "Leaving %s\n", FUNC); + HDfprintf(stdout, "%s: Leaving\n", FUNC); #endif FUNC_LEAVE_NOAPI(ret_value) } /* end H5FD_mpio_truncate() */ /*------------------------------------------------------------------------- - * Function: H5FD_mpio_mpi_rank + * Function: H5FD_mpio_mpi_rank * - * Purpose: Returns the MPI rank for a process + * Purpose: Returns the MPI rank for a process * - * Return: Success: non-negative - * Failure: negative + * Return: Success: non-negative + * Failure: negative * * Programmer: Quincey Koziol * Thursday, May 16, 2002 * - * Modifications: - * *------------------------------------------------------------------------- */ static int @@ -2008,6 +1796,7 @@ H5FD_mpio_mpi_rank(const H5FD_t *_file) FUNC_ENTER_NOAPI_NOINIT_NOERR + /* Sanity checks */ HDassert(file); HDassert(H5FD_MPIO == file->pub.driver_id); @@ -2015,18 +1804,16 @@ H5FD_mpio_mpi_rank(const H5FD_t *_file) } /* end H5FD_mpio_mpi_rank() */ /*------------------------------------------------------------------------- - * Function: H5FD_mpio_mpi_size + * Function: H5FD_mpio_mpi_size * - * Purpose: Returns the number of MPI processes + * Purpose: Returns the number of MPI processes * - * Return: Success: non-negative - * Failure: negative + * Return: Success: non-negative + * Failure: negative * * Programmer: Quincey Koziol * Thursday, May 16, 2002 * - * Modifications: - * *------------------------------------------------------------------------- */ static int @@ -2036,6 +1823,7 @@ H5FD_mpio_mpi_size(const H5FD_t *_file) FUNC_ENTER_NOAPI_NOINIT_NOERR + /* Sanity checks */ HDassert(file); HDassert(H5FD_MPIO == file->pub.driver_id); @@ -2043,19 +1831,16 @@ H5FD_mpio_mpi_size(const H5FD_t *_file) } /* end H5FD_mpio_mpi_size() */ /*------------------------------------------------------------------------- - * Function: H5FD_mpio_communicator - * - * Purpose: Returns the MPI communicator for the file. + * Function: H5FD_mpio_communicator * - * Return: Success: The communicator + * Purpose: Returns the MPI communicator for the file. * - * Failure: NULL + * Return: Success: The communicator + * Failure: Can't fail * * Programmer: Robb Matzke * Monday, August 9, 1999 * - * Modifications: - * *------------------------------------------------------------------------- */ static MPI_Comm @@ -2065,10 +1850,11 @@ H5FD_mpio_communicator(const H5FD_t *_file) FUNC_ENTER_NOAPI_NOINIT_NOERR + /* Sanity checks */ HDassert(file); HDassert(H5FD_MPIO == file->pub.driver_id); FUNC_LEAVE_NOAPI(file->comm) -} +} /* end H5FD_mpio_communicator() */ #endif /* H5_HAVE_PARALLEL */ |