/* * Copyright © 2000 NCSA * All rights reserved. * * Programmer: Quincey Koziol * Monday, April 17, 2000 * * Purpose: The POSIX unbuffered file driver using only the HDF5 public * API and with a few optimizations: the lseek() call is made * only when the current file position is unknown or needs to be * changed based on previous I/O through this driver (don't mix * I/O from this driver with I/O from other parts of the * application to the same file). * With custom modifications... */ #include /*library functions */ #include /*error handling */ #include /*files */ #include /* logging file driver */ #include /*Free Lists */ #include /* Memory allocation */ #include /*property lists */ #ifdef MAX #undef MAX #define MAX(X,Y) ((X)>(Y)?(X):(Y)) #endif /* MAX */ /* The size of the buffer to track allocation requests */ #define TRACK_BUFFER 5000000 /* The driver identification number, initialized at runtime */ static hid_t H5FD_LOG_g = 0; /* File operations */ #define OP_UNKNOWN 0 #define OP_READ 1 #define OP_WRITE 2 /* Driver-specific file access properties */ typedef struct H5FD_log_fapl_t { char *logfile; /* Allocated log file name */ intn verbosity; /* Verbosity of logging information */ } H5FD_log_fapl_t; /* Define strings for the different file memory types */ static const char *flavors[]={ /* These are defined in H5FDpublic.h */ "H5FD_MEM_DEFAULT", "H5FD_MEM_SUPER", "H5FD_MEM_BTREE", "H5FD_MEM_DRAW", "H5FD_MEM_GHEAP", "H5FD_MEM_LHEAP", "H5FD_MEM_OHDR", }; /* * The description of a file belonging to this driver. The `eoa' and `eof' * determine the amount of hdf5 address space in use and the high-water mark * of the file (the current size of the underlying Unix file). The `pos' * value is used to eliminate file position updates when they would be a * no-op. Unfortunately we've found systems that use separate file position * indicators for reading and writing so the lseek can only be eliminated if * the current operation is the same as the previous operation. When opening * a file the `eof' will be set to the current file size, `eoa' will be set * to zero, `pos' will be set to H5F_ADDR_UNDEF (as it is when an error * occurs), and `op' will be set to H5F_OP_UNKNOWN. */ typedef struct H5FD_log_t { H5FD_t pub; /*public stuff, must be first */ int fd; /*the unix file */ haddr_t eoa; /*end of allocated region */ haddr_t eof; /*end of file; current file size*/ haddr_t pos; /*current file I/O position */ int op; /*last operation */ unsigned char *nread; /* Number of reads from a file location */ unsigned char *nwrite; /* Number of write to a file location */ unsigned char *flavor; /* Flavor of information written to file location */ size_t iosize; /* Size of I/O information buffers */ FILE *logfp; /* Log file pointer */ H5FD_log_fapl_t fa; /*driver-specific file access properties*/ #ifndef WIN32 /* * On most systems the combination of device and i-node number uniquely * identify a file. */ dev_t device; /*file device number */ ino_t inode; /*file i-node number */ #else /* * On WIN32 the low-order word of a unique identifier associated with the * file and the volume serial number uniquely identify a file. This number * (which, both? -rpm) may change when the system is restarted or when the * file is opened. After a process opens a file, the identifier is * constant until the file is closed. An application can use this * identifier and the volume serial number to determine whether two * handles refer to the same file. */ int fileindexlo; int fileindexhi; #endif } H5FD_log_t; /* * This driver supports systems that have the lseek64() function by defining * some macros here so we don't have to have conditional compilations later * throughout the code. * * file_offset_t: The datatype for file offsets, the second argument of * the lseek() or lseek64() call. * * file_seek: The function which adjusts the current file position, * either lseek() or lseek64(). */ #ifdef HAVE_LSEEK64 # define file_offset_t off64_t # define file_seek lseek64 #else # define file_offset_t off_t # define file_seek lseek #endif /* * These macros check for overflow of various quantities. These macros * assume that file_offset_t is signed and haddr_t and size_t are unsigned. * * ADDR_OVERFLOW: Checks whether a file address of type `haddr_t' * is too large to be represented by the second argument * of the file seek function. * * SIZE_OVERFLOW: Checks whether a buffer size of type `hsize_t' is too * large to be represented by the `size_t' type. * * REGION_OVERFLOW: Checks whether an address and size pair describe data * which can be addressed entirely by the second * argument of the file seek function. */ #define MAXADDR (((haddr_t)1<<(8*sizeof(file_offset_t)-1))-1) #define ADDR_OVERFLOW(A) (HADDR_UNDEF==(A) || \ ((A) & ~(haddr_t)MAXADDR)) #define SIZE_OVERFLOW(Z) ((Z) & ~(hsize_t)MAXADDR) #define REGION_OVERFLOW(A,Z) (ADDR_OVERFLOW(A) || SIZE_OVERFLOW(Z) || \ sizeof(file_offset_t)fa))); } /* end H5FD_log_fapl_get() */ /*------------------------------------------------------------------------- * Function: H5FD_log_fapl_copy * * Purpose: Copies the log-specific file access properties. * * Return: Success: Ptr to a new property list * * Failure: NULL * * Programmer: Quincey Koziol * Thursday, April 20, 2000 * * Modifications: * *------------------------------------------------------------------------- */ static void * H5FD_log_fapl_copy(const void *_old_fa) { const H5FD_log_fapl_t *old_fa = (const H5FD_log_fapl_t*)_old_fa; H5FD_log_fapl_t *new_fa = H5MM_malloc(sizeof(H5FD_log_fapl_t)); FUNC_ENTER(H5FD_log_fapl_copy, NULL); assert(new_fa); /* Copy the general information */ HDmemcpy(new_fa, old_fa, sizeof(H5FD_log_fapl_t)); /* Deep copy the log file name */ if(old_fa->logfile!=NULL) if (NULL==(new_fa->logfile=HDstrdup(old_fa->logfile))) HRETURN_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "unable to allocate log file name"); FUNC_LEAVE(new_fa); } /* end H5FD_log_fapl_copy() */ /*------------------------------------------------------------------------- * Function: H5FD_log_fapl_free * * Purpose: Frees the log-specific file access properties. * * Return: Success: 0 * * Failure: -1 * * Programmer: Quincey Koziol * Thursday, April 20, 2000 * * Modifications: * *------------------------------------------------------------------------- */ static herr_t H5FD_log_fapl_free(void *_fa) { H5FD_log_fapl_t *fa = (H5FD_log_fapl_t*)_fa; FUNC_ENTER(H5FD_log_fapl_free, FAIL); /* Free the fapl information */ if(fa->logfile) H5MM_xfree(fa->logfile); H5MM_xfree(fa); FUNC_LEAVE(SUCCEED); } /* end H5FD_log_fapl_free() */ /*------------------------------------------------------------------------- * Function: H5FD_log_open * * Purpose: Create and/or opens a Unix file as an HDF5 file. * * Return: Success: A pointer to a new file data structure. The * public fields will be initialized by the * caller, which is always H5FD_open(). * * Failure: NULL * * Programmer: Robb Matzke * Thursday, July 29, 1999 * * Modifications: * *------------------------------------------------------------------------- */ static H5FD_t * H5FD_log_open(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxaddr) { unsigned o_flags; int fd; struct stat sb; H5FD_log_t *file=NULL; H5FD_log_fapl_t *fa; /* File access property list information */ #ifdef WIN32 HFILE filehandle; struct _BY_HANDLE_FILE_INFORMATION fileinfo; int results; #endif FUNC_ENTER(H5FD_log_open, NULL); /* Check arguments */ if (!name || !*name) HRETURN_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "invalid file name"); if (0==maxaddr || HADDR_UNDEF==maxaddr) HRETURN_ERROR(H5E_ARGS, H5E_BADRANGE, NULL, "bogus maxaddr"); if (ADDR_OVERFLOW(maxaddr)) HRETURN_ERROR(H5E_ARGS, H5E_OVERFLOW, NULL, "bogus maxaddr"); /* Build the open flags */ o_flags = (H5F_ACC_RDWR & flags) ? O_RDWR : O_RDONLY; if (H5F_ACC_TRUNC & flags) o_flags |= O_TRUNC; if (H5F_ACC_CREAT & flags) o_flags |= O_CREAT; if (H5F_ACC_EXCL & flags) o_flags |= O_EXCL; /* Open the file */ if ((fd=HDopen(name, o_flags, 0666))<0) HRETURN_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to open file"); if (fstat(fd, &sb)<0) { close(fd); HRETURN_ERROR(H5E_FILE, H5E_BADFILE, NULL, "unable to fstat file"); } /* Create the new file struct */ if (NULL==(file=H5MM_calloc(sizeof(H5FD_log_t)))) HRETURN_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "unable to allocate file struct"); /* Get the driver specific information */ fa = H5Pget_driver_info(fapl_id); file->fd = fd; file->eof = sb.st_size; file->pos = HADDR_UNDEF; file->op = OP_UNKNOWN; #ifdef WIN32 filehandle = _get_osfhandle(fd); results = GetFileInformationByHandle(filehandle, &fileinfo); file->fileindexhi = fileinfo.nFileIndexHigh; file->fileindexlo = fileinfo.nFileIndexLow; #else file->device = sb.st_dev; file->inode = sb.st_ino; #endif /* Get the verbosity of the logging */ file->fa.verbosity=fa->verbosity; /* Check if we are doing any logging at all */ if(file->fa.verbosity>=0) { file->iosize=TRACK_BUFFER; /* Default size for now */ file->nread=H5MM_calloc(file->iosize); file->nwrite=H5MM_calloc(file->iosize); file->flavor=H5MM_calloc(file->iosize); if(fa->logfile) file->logfp=fopen(fa->logfile,"w"); else file->logfp=stderr; } /* end if */ FUNC_LEAVE((H5FD_t*)file); } /*------------------------------------------------------------------------- * Function: H5FD_log_close * * Purpose: Closes a Unix file. * * Return: Success: 0 * * Failure: -1, file not closed. * * Programmer: Robb Matzke * Thursday, July 29, 1999 * * Modifications: * *------------------------------------------------------------------------- */ static herr_t H5FD_log_close(H5FD_t *_file) { H5FD_log_t *file = (H5FD_log_t*)_file; FUNC_ENTER(H5FD_log_close, FAIL); if (H5FD_log_flush(_file)<0) HRETURN_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "unable to flush file"); if (close(file->fd)<0) HRETURN_ERROR(H5E_IO, H5E_CANTCLOSEFILE, FAIL, "unable to close file"); /* Dump I/O information */ if(file->fa.verbosity>=0) { haddr_t addr; haddr_t last_addr; unsigned char last_val; /* Dump the write I/O information */ HDfprintf(file->logfp,"Dumping write I/O information:\n"); last_val=file->nwrite[0]; last_addr=0; addr=1; while(addreoa) { if(file->nwrite[addr]!=last_val) { HDfprintf(file->logfp,"\tAddr %10a-%10a (%10lu bytes) written to %3d times\n",last_addr,(addr-1),(unsigned long)(addr-last_addr),(int)last_val); last_val=file->nwrite[addr]; last_addr=addr; } /* end if */ addr++; } /* end while */ HDfprintf(file->logfp,"\tAddr %10a-%10a (%10lu bytes) written to %3d times\n",last_addr,(addr-1),(unsigned long)(addr-last_addr),(int)last_val); /* Dump the read I/O information */ HDfprintf(file->logfp,"Dumping read I/O information:\n"); last_val=file->nread[0]; last_addr=0; addr=1; while(addreoa) { if(file->nread[addr]!=last_val) { HDfprintf(file->logfp,"\tAddr %10a-%10a (%10lu bytes) read from %3d times\n",last_addr,(addr-1),(unsigned long)(addr-last_addr),(int)last_val); last_val=file->nread[addr]; last_addr=addr; } /* end if */ addr++; } /* end while */ HDfprintf(file->logfp,"\tAddr %10a-%10a (%10lu bytes) read from %3d times\n",last_addr,(addr-1),(unsigned long)(addr-last_addr),(int)last_val); /* Dump the I/O flavor information */ HDfprintf(file->logfp,"Dumping I/O flavor information:\n"); last_val=file->flavor[0]; last_addr=0; addr=1; while(addreoa) { if(file->flavor[addr]!=last_val) { HDfprintf(file->logfp,"\tAddr %10a-%10a (%10lu bytes) flavor is %s\n",last_addr,(addr-1),(unsigned long)(addr-last_addr),flavors[last_val]); last_val=file->flavor[addr]; last_addr=addr; } /* end if */ addr++; } /* end while */ HDfprintf(file->logfp,"\tAddr %10a-%10a (%10lu bytes) flavor is %s\n",last_addr,(addr-1),(unsigned long)(addr-last_addr),flavors[last_val]); /* Free the logging information */ file->nwrite=H5MM_xfree(file->nwrite); file->nread=H5MM_xfree(file->nread); file->flavor=H5MM_xfree(file->flavor); if(file->logfp!=stderr) fclose(file->logfp); } /* end if */ H5MM_xfree(file); FUNC_LEAVE(SUCCEED); } /*------------------------------------------------------------------------- * Function: H5FD_log_cmp * * Purpose: Compares two files belonging to this driver using an * arbitrary (but consistent) ordering. * * Return: Success: A value like strcmp() * * Failure: never fails (arguments were checked by the * caller). * * Programmer: Robb Matzke * Thursday, July 29, 1999 * * Modifications: * *------------------------------------------------------------------------- */ static int H5FD_log_cmp(const H5FD_t *_f1, const H5FD_t *_f2) { const H5FD_log_t *f1 = (const H5FD_log_t*)_f1; const H5FD_log_t *f2 = (const H5FD_log_t*)_f2; int ret_value=0; FUNC_ENTER(H5FD_log_cmp, -2); #ifdef WIN32 if (f1->fileindexhi < f2->fileindexhi) ret_value= -1; if (f1->fileindexhi > f2->fileindexhi) ret_value= 1; if (f1->fileindexlo < f2->fileindexlo) ret_value= -1; if (f1->fileindexlo > f2->fileindexlo) ret_value= 1; #else if (f1->device < f2->device) ret_value= -1; if (f1->device > f2->device) ret_value= 1; if (f1->inode < f2->inode) ret_value= -1; if (f1->inode > f2->inode) ret_value= 1; #endif FUNC_LEAVE(ret_value); } /*------------------------------------------------------------------------- * Function: H5FD_log_query * * Purpose: Set the flags that this VFL driver is capable of supporting. * (listed in H5FDpublic.h) * * Return: Success: non-negative * * Failure: negative * * Programmer: Quincey Koziol * Friday, August 25, 2000 * * Modifications: * *------------------------------------------------------------------------- */ static herr_t H5FD_log_query(const H5FD_t *_f, unsigned long *flags /* out */) { const H5FD_log_t *f = (const H5FD_log_t*)_f; herr_t ret_value=SUCCEED; FUNC_ENTER(H5FD_log_query, FAIL); /* Set the VFL feature flags that this driver supports */ if(flags) { *flags|=H5FD_FEAT_AGGREGATE_METADATA; /* OK to aggregate metadata allocations */ *flags|=H5FD_FEAT_ACCUMULATE_METADATA; /* OK to accumulate metadata for faster writes */ } /* end if */ FUNC_LEAVE(ret_value); } /*------------------------------------------------------------------------- * Function: H5FD_log_alloc * * Purpose: Allocate file memory. * * Return: Success: Address of new memory * * Failure: HADDR_UNDEF * * Programmer: Quincey Koziol * Monday, April 17, 2000 * * Modifications: * *------------------------------------------------------------------------- */ static haddr_t H5FD_log_alloc(H5FD_t *_file, H5FD_mem_t type, hsize_t size) { H5FD_log_t *file = (H5FD_log_t*)_file; haddr_t addr; FUNC_ENTER(H5FD_log_alloc, HADDR_UNDEF); addr = file->eoa; file->eoa += size; #ifdef QAK printf("%s: flavor=%s, size=%lu\n",FUNC,flavors[type],(unsigned long)size); #endif /* QAK */ /* Retain the (first) flavor of the information written to the file */ if(file->fa.verbosity>=0) { assert(addriosize); HDmemset(&file->flavor[addr],type,size); if(file->fa.verbosity>1) HDfprintf(file->logfp,"%10a-%10a (%10lu bytes) Allocated, flavor=%s\n",addr,addr+size-1,(unsigned long)size,flavors[file->flavor[addr]]); } /* end if */ FUNC_LEAVE(addr); } /* H5FD_log_alloc() */ /*------------------------------------------------------------------------- * Function: H5FD_log_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. * * Return: Success: The end-of-address marker. * * Failure: HADDR_UNDEF * * Programmer: Robb Matzke * Monday, August 2, 1999 * * Modifications: * *------------------------------------------------------------------------- */ static haddr_t H5FD_log_get_eoa(H5FD_t *_file) { H5FD_log_t *file = (H5FD_log_t*)_file; FUNC_ENTER(H5FD_log_get_eoa, HADDR_UNDEF); FUNC_LEAVE(file->eoa); } /*------------------------------------------------------------------------- * Function: H5FD_log_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. * * Return: Success: 0 * * Failure: -1 * * Programmer: Robb Matzke * Thursday, July 29, 1999 * * Modifications: * *------------------------------------------------------------------------- */ static herr_t H5FD_log_set_eoa(H5FD_t *_file, haddr_t addr) { H5FD_log_t *file = (H5FD_log_t*)_file; FUNC_ENTER(H5FD_log_set_eoa, FAIL); file->eoa = addr; FUNC_LEAVE(SUCCEED); } /*------------------------------------------------------------------------- * Function: H5FD_log_get_eof * * Purpose: Returns the end-of-file marker, which is the greater of * either the Unix end-of-file or the HDF5 end-of-address * markers. * * Return: Success: End of file address, the first address past * the end of the "file", either the Unix file * or the HDF5 file. * * Failure: HADDR_UNDEF * * Programmer: Robb Matzke * Thursday, July 29, 1999 * * Modifications: * *------------------------------------------------------------------------- */ static haddr_t H5FD_log_get_eof(H5FD_t *_file) { H5FD_log_t *file = (H5FD_log_t*)_file; FUNC_ENTER(H5FD_get_get_eof, HADDR_UNDEF); FUNC_LEAVE(MAX(file->eof, file->eoa)); } /*------------------------------------------------------------------------- * Function: H5FD_log_read * * Purpose: Reads SIZE bytes of data from FILE beginning at address ADDR * into buffer BUF according to data transfer properties in * DXPL_ID. * * Return: Success: Zero. Result is stored in caller-supplied * buffer BUF. * * Failure: -1, Contents of buffer BUF are undefined. * * Programmer: Robb Matzke * Thursday, July 29, 1999 * * Modifications: * *------------------------------------------------------------------------- */ static herr_t H5FD_log_read(H5FD_t *_file, hid_t UNUSED dxpl_id, haddr_t addr, hsize_t size, void *buf/*out*/) { H5FD_log_t *file = (H5FD_log_t*)_file; ssize_t nbytes; FUNC_ENTER(H5FD_log_read, FAIL); assert(file && file->pub.cls); assert(buf); /* Check for overflow conditions */ if (HADDR_UNDEF==addr) HRETURN_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "addr undefined"); if (REGION_OVERFLOW(addr, size)) HRETURN_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow"); if (addr+size>file->eoa) HRETURN_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow"); /* Log the I/O information about the read */ if(file->fa.verbosity>=0) { hsize_t tmp_size=size; haddr_t tmp_addr=addr; assert((addr+size)iosize); while(tmp_size-->0) file->nread[tmp_addr++]++; if(file->fa.verbosity>0) HDfprintf(file->logfp,"%10a-%10a (%10lu bytes) Read, flavor=%s\n",addr,addr+size-1,(unsigned long)size,flavors[file->flavor[addr]]); } /* Seek to the correct location */ if ((addr!=file->pos || OP_READ!=file->op) && file_seek(file->fd, (file_offset_t)addr, SEEK_SET)<0) { file->pos = HADDR_UNDEF; file->op = OP_UNKNOWN; HRETURN_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "unable to seek to proper position"); } /* * Read data, being careful of interrupted system calls, partial results, * and the end of the file. */ while (size>0) { do nbytes = read(file->fd, buf, size); while (-1==nbytes && EINTR==errno); if (-1==nbytes) { /* error */ file->pos = HADDR_UNDEF; file->op = OP_UNKNOWN; HRETURN_ERROR(H5E_IO, H5E_READERROR, FAIL, "file read failed"); } if (0==nbytes) { /* end of file but not end of format address space */ memset(buf, 0, size); size = 0; } assert(nbytes>=0); assert((hsize_t)nbytes<=size); size -= (hsize_t)nbytes; addr += (haddr_t)nbytes; buf = (char*)buf + nbytes; } /* Update current position */ file->pos = addr; file->op = OP_READ; FUNC_LEAVE(SUCCEED); } /*------------------------------------------------------------------------- * Function: H5FD_log_write * * Purpose: Writes SIZE bytes of data to FILE beginning at address ADDR * from buffer BUF according to data transfer properties in * DXPL_ID. * * Return: Success: Zero * * Failure: -1 * * Programmer: Robb Matzke * Thursday, July 29, 1999 * * Modifications: * *------------------------------------------------------------------------- */ static herr_t H5FD_log_write(H5FD_t *_file, H5FD_mem_t type, hid_t UNUSED dxpl_id, haddr_t addr, hsize_t size, const void *buf) { H5FD_log_t *file = (H5FD_log_t*)_file; ssize_t nbytes; FUNC_ENTER(H5FD_log_write, FAIL); assert(file && file->pub.cls); assert(buf); /* Verify that we are writing out the type of data we allocated in this location */ assert(type==file->flavor[addr]); /* Check for overflow conditions */ if (HADDR_UNDEF==addr) HRETURN_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "addr undefined"); if (REGION_OVERFLOW(addr, size)) HRETURN_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow"); if (addr+size>file->eoa) HRETURN_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow"); /* Log the I/O information about the write */ if(file->fa.verbosity>=0) { hsize_t tmp_size=size; haddr_t tmp_addr=addr; assert((addr+size)iosize); while(tmp_size-->0) file->nwrite[tmp_addr++]++; /* Log information about the seek, if it's going to occur */ if(file->fa.verbosity>1 && (addr!=file->pos || OP_WRITE!=file->op)) HDfprintf(file->logfp,"Seek: From %10a To %10a\n",file->pos,addr); /* Log information about the write */ if(file->fa.verbosity>0) HDfprintf(file->logfp,"%10a-%10a (%10lu bytes) Written, flavor=%s\n",addr,addr+size-1,(unsigned long)size,flavors[file->flavor[addr]]); } /* Seek to the correct location */ if ((addr!=file->pos || OP_WRITE!=file->op) && file_seek(file->fd, (file_offset_t)addr, SEEK_SET)<0) { file->pos = HADDR_UNDEF; file->op = OP_UNKNOWN; HRETURN_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "unable to seek to proper position"); } /* * Write the data, being careful of interrupted system calls and partial * results */ while (size>0) { do nbytes = write(file->fd, buf, size); while (-1==nbytes && EINTR==errno); if (-1==nbytes) { /* error */ file->pos = HADDR_UNDEF; file->op = OP_UNKNOWN; HRETURN_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed"); } assert(nbytes>0); assert((hsize_t)nbytes<=size); size -= (hsize_t)nbytes; addr += (haddr_t)nbytes; buf = (const char*)buf + nbytes; } /* Update current position and eof */ file->pos = addr; file->op = OP_WRITE; if (file->pos>file->eof) file->eof = file->pos; FUNC_LEAVE(SUCCEED); } /*------------------------------------------------------------------------- * Function: H5FD_log_flush * * Purpose: Makes sure that the true file size is the same (or larger) * than the end-of-address. * * Return: Success: Non-negative * * Failure: Negative * * Programmer: Robb Matzke * Wednesday, August 4, 1999 * * Modifications: * *------------------------------------------------------------------------- */ static herr_t H5FD_log_flush(H5FD_t *_file) { H5FD_log_t *file = (H5FD_log_t*)_file; FUNC_ENTER(H5FD_log_seek, FAIL); if (file->eoa>file->eof) { if (-1==file_seek(file->fd, (file_offset_t)(file->eoa-1), SEEK_SET)) HRETURN_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "unable to seek to proper position"); if (write(file->fd, "", 1)!=1) HRETURN_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed"); file->eof = file->eoa; file->pos = file->eoa; file->op = OP_WRITE; } FUNC_LEAVE(SUCCEED); }