/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Copyright by the Board of Trustees of the University of Illinois. * * All rights reserved. * * * * This file is part of HDF5. The full HDF5 copyright notice, including * * terms governing use, modification, and redistribution, is contained in * * the files COPYING and Copyright.html. COPYING can be found at the root * * of the source code distribution tree; Copyright.html can be found at the * * root level of an installed copy of the electronic HDF5 document set and * * is linked from the top-level documents page. It can also be found at * * http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have * * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ /*------------------------------------------------------------------------- * * Created: H5MF.c * Jul 11 1997 * Robb Matzke * * Purpose: File memory management functions. * * Modifications: * Robb Matzke, 5 Aug 1997 * Added calls to H5E. * * Robb Matzke, 8 Jun 1998 * Implemented a very simple free list which is not persistent and which * is lossy. * *------------------------------------------------------------------------- */ #define H5F_PACKAGE /*suppress error about including H5Fpkg */ #include "H5private.h" #include "H5Eprivate.h" #include "H5Fpkg.h" #include "H5FDprivate.h" #include "H5MFprivate.h" #define PABLO_MASK H5MF_mask /* Is the interface initialized? */ static int interface_initialize_g = 0; #define INTERFACE_INIT NULL /*------------------------------------------------------------------------- * Function: H5MF_alloc * * Purpose: Allocate SIZE bytes of file memory and return the relative * address where that contiguous chunk of file memory exists. * The TYPE argument describes the purpose for which the storage * is being requested. * * Return: Success: The file address of new chunk. * * Failure: HADDR_UNDEF * * Programmer: Robb Matzke * matzke@llnl.gov * Jul 11 1997 * * Modifications: * Robb Matzke, 1999-08-04 * Modified to work with the virtual file layer. *------------------------------------------------------------------------- */ haddr_t H5MF_alloc(H5F_t *f, H5FD_mem_t type, hid_t dxpl_id, hsize_t size) { haddr_t ret_value; FUNC_ENTER_NOAPI(H5MF_alloc, HADDR_UNDEF); /* check arguments */ assert(f); assert(size > 0); /* Fail if we don't have write access */ if (0==(f->intent & H5F_ACC_RDWR)) HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, HADDR_UNDEF, "file is read-only"); /* Allocate space from the virtual file layer */ if (HADDR_UNDEF==(ret_value=H5FD_alloc(f->shared->lf, type, dxpl_id, size))) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, HADDR_UNDEF, "file allocation failed"); /* Convert absolute file address to relative file address */ assert(ret_value>=f->shared->base_addr); /* Set return value */ ret_value -= f->shared->base_addr; done: FUNC_LEAVE_NOAPI(ret_value); } /*------------------------------------------------------------------------- * Function: H5MF_xfree * * Purpose: Frees part of a file, making that part of the file * available for reuse. * * Return: Non-negative on success/Negative on failure * * Programmer: Robb Matzke * matzke@llnl.gov * Jul 17 1997 * * Modifications: * Robb Matzke, 1999-07-28 * The ADDR argument is passed by value * * Robb Matzke, 1999-08-03 * Modified to use the virtual file layer. *------------------------------------------------------------------------- */ herr_t H5MF_xfree(H5F_t *f, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, hsize_t size) { herr_t ret_value=SUCCEED; /* Return value */ FUNC_ENTER_NOAPI(H5MF_xfree, FAIL); /* check arguments */ assert(f); if (!H5F_addr_defined(addr) || 0 == size) HGOTO_DONE(SUCCEED); assert(addr!=0); /* Convert relative address to absolute address */ addr += f->shared->base_addr; /* Allow virtual file layer to free block */ if (H5FD_free(f->shared->lf, type, dxpl_id, addr, size)<0) { #ifdef H5MF_DEBUG if (H5DEBUG(MF)) { fprintf(H5DEBUG(MF), "H5MF_free: lost %lu bytes of file storage\n", (unsigned long)size); } #endif } done: FUNC_LEAVE_NOAPI(ret_value); } /*------------------------------------------------------------------------- * Function: H5MF_realloc * * Purpose: Changes the size of an allocated chunk, possibly moving it to * a new address. The chunk to change is at address OLD_ADDR * and is exactly OLD_SIZE bytes (if these are H5F_ADDR_UNDEF * and zero then this function acts like H5MF_alloc). The new * size will be NEW_SIZE and its address is the return value (if * NEW_SIZE is zero then this function acts like H5MF_free and * an undefined address is returned). * * If the new size is less than the old size then the new * address will be the same as the old address (except for the * special case where the new size is zero). * * If the new size is more than the old size then most likely a * new address will be returned. However, under certain * circumstances the library may return the same address. * * Return: Success: The relative file address of the new block. * * Failure: HADDR_UNDEF * * Programmer: Robb Matzke * Thursday, April 16, 1998 * * Modifications: * Robb Matzke, 1999-07-28 * The ORIG_ADDR is passed by value. The name of NEW_ADDR has * been changed to NEW_ADDR_P * * Robb Matzke, 1999-08-04 * Modified to work with the virtual file layer. *------------------------------------------------------------------------- */ haddr_t H5MF_realloc(H5F_t *f, H5FD_mem_t type, hid_t dxpl_id, haddr_t old_addr, hsize_t old_size, hsize_t new_size) { haddr_t ret_value; FUNC_ENTER_NOAPI(H5MF_realloc, HADDR_UNDEF); /* Convert old relative address to absolute address */ old_addr += f->shared->base_addr; /* Reallocate memory from the virtual file layer */ ret_value = H5FD_realloc(f->shared->lf, type, dxpl_id, old_addr, old_size, new_size); if (HADDR_UNDEF==ret_value) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, HADDR_UNDEF, "unable to allocate new file memory"); /* Convert return value to relative address */ assert(ret_value>=f->shared->base_addr); /* Set return value */ ret_value -= f->shared->base_addr; done: FUNC_LEAVE_NOAPI(ret_value); }