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Diffstat (limited to 'src/H5H.c')
| -rw-r--r-- | src/H5H.c | 1004 |
1 files changed, 0 insertions, 1004 deletions
diff --git a/src/H5H.c b/src/H5H.c deleted file mode 100644 index 54e537a..0000000 --- a/src/H5H.c +++ /dev/null @@ -1,1004 +0,0 @@ -/*------------------------------------------------------------------------- - * Copyright (C) 1997 National Center for Supercomputing Applications. - * All rights reserved. - * - *------------------------------------------------------------------------- - * - * Created: H5H.c - * Jul 16 1997 - * Robb Matzke <matzke@llnl.gov> - * - * Purpose: Heap functions for the global small object heap - * and for local symbol table name heaps. - * - * Modifications: - * - * Robb Matzke, 5 Aug 1997 - * Added calls to H5E. - * - *------------------------------------------------------------------------- - */ -#include <H5private.h> /*library */ -#include <H5ACprivate.h> /*cache */ -#include <H5Eprivate.h> /*error handling */ -#include <H5Hprivate.h> /*self */ -#include <H5MFprivate.h> /*file memory management */ -#include <H5MMprivate.h> /*core memory management */ - -#define H5H_FREE_NULL 1 /*end of free list on disk */ -#define PABLO_MASK H5H_mask - -typedef struct H5H_free_t { - size_t offset; /*offset of free block */ - size_t size; /*size of free block */ - struct H5H_free_t *prev; /*previous entry in free list */ - struct H5H_free_t *next; /*next entry in free list */ -} H5H_free_t; - -typedef struct H5H_t { - intn dirty; - haddr_t addr; /*address of data */ - size_t disk_alloc; /*data bytes allocated on disk */ - size_t mem_alloc; /*data bytes allocated in mem */ - uint8 *chunk; /*the chunk, including header */ - H5H_free_t *freelist; /*the free list */ -} H5H_t; - -/* PRIVATE PROTOTYPES */ -static H5H_t *H5H_load(H5F_t *f, const haddr_t *addr, const void *udata1, - void *udata2); -static herr_t H5H_flush(H5F_t *f, hbool_t dest, const haddr_t *addr, - H5H_t *heap); - -/* - * H5H inherits cache-like properties from H5AC - */ -static const H5AC_class_t H5AC_HEAP[1] = {{ - H5AC_HEAP_ID, - (void *(*)(H5F_t *, const haddr_t *, const void *, void *)) H5H_load, - (herr_t (*)(H5F_t *, hbool_t, const haddr_t *, void *)) H5H_flush, -}}; - -/* Interface initialization */ -static intn interface_initialize_g = FALSE; -#define INTERFACE_INIT NULL - - -/*------------------------------------------------------------------------- - * Function: H5H_create - * - * Purpose: Creates a new heap data structure on disk and caches it - * in memory. SIZE_HINT is a hint for the initial size of the - * data area of the heap. If size hint is invalid then a - * reasonable (but probably not optimal) size will be chosen. - * If the heap ever has to grow, then REALLOC_HINT is the - * minimum amount by which the heap will grow. - * - * Return: Success: SUCCEED. The file address of new heap is - * returned through the ADDR argument. - * - * Failure: FAIL - * - * Programmer: Robb Matzke - * matzke@llnl.gov - * Jul 16 1997 - * - * Modifications: - * - * Robb Matzke, 5 Aug 1997 - * Takes a flag that determines the type of heap that is - * created. - * - *------------------------------------------------------------------------- - */ -herr_t -H5H_create(H5F_t *f, H5H_type_t heap_type, size_t size_hint, - haddr_t *addr/*out*/) -{ - H5H_t *heap = NULL; - size_t total_size; /*total heap size on disk */ - - FUNC_ENTER(H5H_create, FAIL); - - /* check arguments */ - assert(f); - assert(addr); -#ifndef NDEBUG - if (H5H_GLOBAL == heap_type) { - fprintf(stderr, "H5H_create: a local heap is used as the global " - "heap\n"); - } -#endif - - if (size_hint && size_hint < H5H_SIZEOF_FREE(f)) { - size_hint = H5H_SIZEOF_FREE(f); - } - size_hint = H5H_ALIGN(size_hint); - - /* allocate file version */ - total_size = H5H_SIZEOF_HDR(f) + size_hint; - if (H5MF_alloc(f, H5MF_META, total_size, addr/*out*/) < 0) { - HRETURN_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, - "unable to allocate file memory"); - } - - /* allocate memory version */ - heap = H5MM_xcalloc(1, sizeof(H5H_t)); - heap->addr = *addr; - H5F_addr_inc(&(heap->addr), H5H_SIZEOF_HDR(f)); - heap->disk_alloc = size_hint; - heap->mem_alloc = size_hint; - heap->chunk = H5MM_xcalloc(1, H5H_SIZEOF_HDR(f) + size_hint); - - /* free list */ - if (size_hint) { - heap->freelist = H5MM_xmalloc(sizeof(H5H_free_t)); - heap->freelist->offset = 0; - heap->freelist->size = size_hint; - heap->freelist->prev = heap->freelist->next = NULL; - } else { - heap->freelist = NULL; - } - - /* add to cache */ - heap->dirty = 1; - if (H5AC_set(f, H5AC_HEAP, addr, heap) < 0) { - heap->chunk = H5MM_xfree(heap->chunk); - heap->freelist = H5MM_xfree(heap->freelist); - HRETURN_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, - "unable to cache heap"); - } - FUNC_LEAVE(SUCCEED); -} - -/*------------------------------------------------------------------------- - * Function: H5H_load - * - * Purpose: Loads a heap from disk. - * - * Return: Success: Ptr to heap memory data structure. - * - * Failure: NULL - * - * Programmer: Robb Matzke - * matzke@llnl.gov - * Jul 17 1997 - * - * Modifications: - * - *------------------------------------------------------------------------- - */ -static H5H_t * -H5H_load(H5F_t *f, const haddr_t *addr, const void *udata1, void *udata2) -{ - uint8 hdr[52]; - const uint8 *p = NULL; - H5H_t *heap = NULL; - H5H_free_t *fl = NULL, *tail = NULL; - size_t free_block = H5H_FREE_NULL; - H5H_t *ret_value = NULL; - - FUNC_ENTER(H5H_load, NULL); - - /* check arguments */ - assert(f); - assert(addr && H5F_addr_defined(addr)); - assert(H5H_SIZEOF_HDR(f) <= sizeof hdr); - assert(!udata1); - assert(!udata2); - - if (H5F_block_read(f, addr, H5H_SIZEOF_HDR(f), hdr) < 0) { - HRETURN_ERROR(H5E_HEAP, H5E_READERROR, NULL, - "unable to read heap header"); - } - p = hdr; - heap = H5MM_xcalloc(1, sizeof(H5H_t)); - - /* magic number */ - if (HDmemcmp(hdr, H5H_MAGIC, H5H_SIZEOF_MAGIC)) { - HGOTO_ERROR(H5E_HEAP, H5E_CANTLOAD, NULL, - "bad heap signature"); - } - p += H5H_SIZEOF_MAGIC; - - /* Reserved */ - p += 4; - - /* heap data size */ - H5F_decode_length(f, p, heap->disk_alloc); - heap->mem_alloc = heap->disk_alloc; - - /* free list head */ - H5F_decode_length(f, p, free_block); - if (free_block != H5H_FREE_NULL && free_block >= heap->disk_alloc) { - HGOTO_ERROR(H5E_HEAP, H5E_CANTLOAD, NULL, - "bad heap free list"); - } - - /* data */ - H5F_addr_decode(f, &p, &(heap->addr)); - heap->chunk = H5MM_xcalloc(1, H5H_SIZEOF_HDR(f) + heap->mem_alloc); - if (heap->disk_alloc && - H5F_block_read(f, &(heap->addr), heap->disk_alloc, - heap->chunk + H5H_SIZEOF_HDR(f)) < 0) { - HGOTO_ERROR(H5E_HEAP, H5E_CANTLOAD, NULL, - "unable to read heap data"); - } - - /* free list */ - while (H5H_FREE_NULL != free_block) { - if (free_block >= heap->disk_alloc) { - HGOTO_ERROR(H5E_HEAP, H5E_CANTLOAD, NULL, - "bad heap free list"); - } - fl = H5MM_xmalloc(sizeof(H5H_free_t)); - fl->offset = free_block; - fl->prev = tail; - fl->next = NULL; - if (tail) tail->next = fl; - tail = fl; - if (!heap->freelist) heap->freelist = fl; - - p = heap->chunk + H5H_SIZEOF_HDR(f) + free_block; - H5F_decode_length(f, p, free_block); - H5F_decode_length(f, p, fl->size); - - if (fl->offset + fl->size > heap->disk_alloc) { - HGOTO_ERROR(H5E_HEAP, H5E_CANTLOAD, NULL, - "bad heap free list"); - } - } - - ret_value = heap; - - done: - if (!ret_value && heap) { - heap->chunk = H5MM_xfree(heap->chunk); - H5MM_xfree(heap); - for (fl = heap->freelist; fl; fl = tail) { - tail = fl->next; - H5MM_xfree(fl); - } - } - FUNC_LEAVE(ret_value); -} - -/*------------------------------------------------------------------------- - * Function: H5H_flush - * - * Purpose: Flushes a heap from memory to disk if it's dirty. Optionally - * deletes the heap from memory. - * - * Return: Success: SUCCEED - * - * Failure: FAIL - * - * Programmer: Robb Matzke - * matzke@llnl.gov - * Jul 17 1997 - * - * Modifications: - * - *------------------------------------------------------------------------- - */ -static herr_t -H5H_flush(H5F_t *f, hbool_t destroy, const haddr_t *addr, H5H_t *heap) -{ - uint8 *p = heap->chunk; - H5H_free_t *fl = heap->freelist; - haddr_t hdr_end_addr; - - FUNC_ENTER(H5H_flush, FAIL); - - /* check arguments */ - assert(f); - assert(addr && H5F_addr_defined(addr)); - assert(heap); - - if (heap->dirty) { - /* - * If the heap grew larger than disk storage then move the - * data segment of the heap to a larger contiguous block of - * disk storage. - */ - if (heap->mem_alloc > heap->disk_alloc) { - haddr_t old_addr = heap->addr, new_addr; - if (H5MF_alloc(f, H5MF_META, heap->mem_alloc, - &new_addr/*out*/)<0) { - HRETURN_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, - "unable to allocate file space for heap"); - } - heap->addr = new_addr; - H5MF_free(f, &old_addr, heap->disk_alloc); - H5E_clear(); /*don't really care if the free failed */ - heap->disk_alloc = heap->mem_alloc; - } - - /* - * Write the header. - */ - HDmemcpy(p, H5H_MAGIC, H5H_SIZEOF_MAGIC); - p += H5H_SIZEOF_MAGIC; - *p++ = 0; /*reserved*/ - *p++ = 0; /*reserved*/ - *p++ = 0; /*reserved*/ - *p++ = 0; /*reserved*/ - H5F_encode_length(f, p, heap->mem_alloc); - H5F_encode_length(f, p, fl ? fl->offset : H5H_FREE_NULL); - H5F_addr_encode(f, &p, &(heap->addr)); - - /* - * Write the free list. - */ - while (fl) { - assert (fl->offset == H5H_ALIGN (fl->offset)); - p = heap->chunk + H5H_SIZEOF_HDR(f) + fl->offset; - if (fl->next) { - H5F_encode_length(f, p, fl->next->offset); - } else { - H5F_encode_length(f, p, H5H_FREE_NULL); - } - H5F_encode_length(f, p, fl->size); - fl = fl->next; - } - - /* - * Copy buffer to disk. - */ - hdr_end_addr = *addr; - H5F_addr_inc(&hdr_end_addr, H5H_SIZEOF_HDR(f)); - if (H5F_addr_eq(&(heap->addr), &hdr_end_addr)) { - /* The header and data are contiguous */ - if (H5F_block_write(f, addr, H5H_SIZEOF_HDR(f) + heap->disk_alloc, - heap->chunk) < 0) { - HRETURN_ERROR(H5E_HEAP, H5E_WRITEERROR, FAIL, - "unable to write heap header and data to disk"); - } - } else { - if (H5F_block_write(f, addr, H5H_SIZEOF_HDR(f), heap->chunk) < 0) { - HRETURN_ERROR(H5E_HEAP, H5E_WRITEERROR, FAIL, - "unable to write heap header to disk"); - } - if (H5F_block_write(f, &(heap->addr), heap->disk_alloc, - heap->chunk + H5H_SIZEOF_HDR(f)) < 0) { - HRETURN_ERROR(H5E_HEAP, H5E_WRITEERROR, FAIL, - "unable to write heap data to disk"); - } - } - - heap->dirty = 0; - } - - /* - * Should we destroy the memory version? - */ - if (destroy) { - heap->chunk = H5MM_xfree(heap->chunk); - while (heap->freelist) { - fl = heap->freelist; - heap->freelist = fl->next; - H5MM_xfree(fl); - } - H5MM_xfree(heap); - } - FUNC_LEAVE(SUCCEED); -} - -/*------------------------------------------------------------------------- - * Function: H5H_read - * - * Purpose: Reads some object (or part of an object) from the heap - * whose address is ADDR in file F. OFFSET is the byte offset - * from the beginning of the heap at which to begin reading - * and SIZE is the number of bytes to read. - * - * If BUF is the null pointer then a buffer is allocated by - * this function. - * - * Attempting to read past the end of an object may cause this - * function to fail. - * - * If the heap address ADDR is the the null pointer then the - * address comes from the H5F_t global heap field. - * - * Return: Success: BUF (or the allocated buffer) - * - * Failure: NULL - * - * Programmer: Robb Matzke - * matzke@llnl.gov - * Jul 16 1997 - * - * Modifications: - * - *------------------------------------------------------------------------- - */ -void * -H5H_read(H5F_t *f, const haddr_t *addr, size_t offset, size_t size, void *buf) -{ - H5H_t *heap = NULL; - - FUNC_ENTER(H5H_read, NULL); - - /* check arguments */ - assert(f); - if (!addr) addr = &(f->shared->smallobj_addr); - assert(H5F_addr_defined(addr)); - - if (NULL == (heap = H5AC_find(f, H5AC_HEAP, addr, NULL, NULL))) { - HRETURN_ERROR(H5E_HEAP, H5E_CANTLOAD, NULL, - "unable to load heap"); - } - assert(offset < heap->mem_alloc); - assert(offset + size <= heap->mem_alloc); - - if (!buf) buf = H5MM_xmalloc(size); - HDmemcpy(buf, heap->chunk + H5H_SIZEOF_HDR(f) + offset, size); - - FUNC_LEAVE(buf); -} - -/*------------------------------------------------------------------------- - * Function: H5H_peek - * - * Purpose: This function is a more efficient version of H5H_read. - * Instead of copying a heap object into a caller-supplied - * buffer, this function returns a pointer directly into the - * cache where the heap is being held. Thus, the return pointer - * is valid only until the next call to the cache. - * - * The address of the heap is ADDR in file F. OFFSET is the - * byte offset of the object from the beginning of the heap and - * may include an offset into the interior of the object. - * - * If the heap address ADDR is the null pointer then - * the address comes from the H5F_t global heap field. - * - * Return: Success: Ptr to the object. The pointer points to - * a chunk of memory large enough to hold the - * object from the specified offset (usually - * the beginning of the object) to the end - * of the object. Do not attempt to read past - * the end of the object. - * - * Failure: NULL - * - * Programmer: Robb Matzke - * matzke@llnl.gov - * Jul 16 1997 - * - * Modifications: - * - *------------------------------------------------------------------------- - */ -const void * -H5H_peek(H5F_t *f, const haddr_t *addr, size_t offset) -{ - H5H_t *heap = NULL; - const void *retval = NULL; - - FUNC_ENTER(H5H_peek, NULL); - - /* check arguments */ - assert(f); - if (!addr) addr = &(f->shared->smallobj_addr); - assert(H5F_addr_defined(addr)); - - if (NULL == (heap = H5AC_find(f, H5AC_HEAP, addr, NULL, NULL))) { - HRETURN_ERROR(H5E_HEAP, H5E_CANTLOAD, NULL, - "unable to load heap"); - } - assert(offset < heap->mem_alloc); - - retval = heap->chunk + H5H_SIZEOF_HDR(f) + offset; - FUNC_LEAVE(retval); -} - -/*------------------------------------------------------------------------- - * Function: H5H_remove_free - * - * Purpose: Removes free list element FL from the specified heap and - * frees it. - * - * Return: NULL - * - * Programmer: Robb Matzke - * matzke@llnl.gov - * Jul 17 1997 - * - * Modifications: - * - *------------------------------------------------------------------------- - */ -static H5H_free_t * -H5H_remove_free(H5H_t *heap, H5H_free_t *fl) -{ - if (fl->prev) fl->prev->next = fl->next; - if (fl->next) fl->next->prev = fl->prev; - - if (!fl->prev) heap->freelist = fl->next; - return H5MM_xfree(fl); -} - -/*------------------------------------------------------------------------- - * Function: H5H_insert - * - * Purpose: Inserts a new item into the heap. - * - * If the heap address ADDR is the null pointer then - * the address comes from the H5F_t global heap field. - * - * Return: Success: Offset of new item within heap. - * - * Failure: (size_t)(-1) - * - * Programmer: Robb Matzke - * matzke@llnl.gov - * Jul 17 1997 - * - * Modifications: - * - *------------------------------------------------------------------------- - */ -size_t -H5H_insert(H5F_t *f, const haddr_t *addr, size_t buf_size, const void *buf) -{ - H5H_t *heap = NULL; - H5H_free_t *fl = NULL, *max_fl = NULL; - size_t offset = 0; - size_t need_size, old_size, need_more; - hbool_t found; -#ifndef NDEBUG - static int nmessages = 0; -#endif - - FUNC_ENTER(H5H_insert, (size_t)(-1)); - - /* check arguments */ - assert(f); - if (!addr) addr = &(f->shared->smallobj_addr); - assert(H5F_addr_defined(addr)); - assert(buf_size > 0); - assert(buf); - - if (NULL == (heap = H5AC_find(f, H5AC_HEAP, addr, NULL, NULL))) { - HRETURN_ERROR(H5E_HEAP, H5E_CANTLOAD, (size_t)(-1), - "unable to load heap"); - } - heap->dirty += 1; - - /* - * In order to keep the free list descriptors aligned on word boundaries, - * whatever that might mean, we round the size up to the next multiple of - * a word. - */ - need_size = H5H_ALIGN(buf_size); - - /* - * Look for a free slot large enough for this object and which would - * leave zero or at least H5G_SIZEOF_FREE bytes left over. - */ - for (fl=heap->freelist, found=FALSE; fl; fl=fl->next) { - if (fl->size > need_size && - fl->size - need_size >= H5H_SIZEOF_FREE(f)) { - /* a bigger free block was found */ - offset = fl->offset; - fl->offset += need_size; - fl->size -= need_size; - assert (fl->offset==H5H_ALIGN (fl->offset)); - assert (fl->size==H5H_ALIGN (fl->size)); - found = TRUE; - break; - } else if (fl->size == need_size) { - /* free block of exact size found */ - offset = fl->offset; - fl = H5H_remove_free(heap, fl); - found = TRUE; - break; - } else if (!max_fl || max_fl->offset < fl->offset) { - /* use worst fit */ - max_fl = fl; - } - } - - /* - * If no free chunk was large enough, then allocate more space and - * add it to the free list. If the heap ends with a free chunk, we - * can extend that free chunk. Otherwise we'll have to make another - * free chunk. If the heap must expand, we double its size. - */ - if (found==FALSE) { - need_more = MAX3(need_size, heap->mem_alloc, H5H_SIZEOF_FREE(f)); - - if (max_fl && max_fl->offset + max_fl->size == heap->mem_alloc) { - /* - * Increase the size of the maximum free block. - */ - offset = max_fl->offset; - max_fl->offset += need_size; - max_fl->size += need_more - need_size; - assert (max_fl->offset==H5H_ALIGN (max_fl->offset)); - assert (max_fl->size==H5H_ALIGN (max_fl->size)); - - if (max_fl->size < H5H_SIZEOF_FREE(f)) { -#ifndef NDEBUG - if (max_fl->size) { - fprintf(stderr, "H5H_insert: lost %lu bytes at line %d\n", - (unsigned long) (max_fl->size), __LINE__); - if (0 == nmessages++) { - fprintf(stderr, "Messages from H5H_insert() will go " - "away when assertions are turned off.\n"); - } - } -#endif - max_fl = H5H_remove_free(heap, max_fl); - } - } else { - /* - * Create a new free list element large enough that we can - * take some space out of it right away. - */ - offset = heap->mem_alloc; - if (need_more - need_size >= H5H_SIZEOF_FREE(f)) { - fl = H5MM_xmalloc(sizeof(H5H_free_t)); - fl->offset = heap->mem_alloc + need_size; - fl->size = need_more - need_size; - assert (fl->offset==H5H_ALIGN (fl->offset)); - assert (fl->size==H5H_ALIGN (fl->size)); - fl->prev = NULL; - fl->next = heap->freelist; - if (heap->freelist) heap->freelist->prev = fl; - heap->freelist = fl; -#ifndef NDEBUG - } else if (need_more > need_size) { - fprintf(stderr, "H5H_insert: lost %lu bytes at line %d\n", - (unsigned long) (need_more - need_size), __LINE__); - if (0 == nmessages++) { - fprintf(stderr, "Messages from H5H_insert() will go away " - "when assertions are turned off.\n"); - } -#endif - } - } - -#ifndef NDEBUG - fprintf(stderr, "H5H_insert: resize mem buf from %lu to %lu bytes\n", - (unsigned long) (heap->mem_alloc), - (unsigned long) (heap->mem_alloc + need_more)); - if (0 == nmessages++) { - fprintf(stderr, "Messages from H5H_insert() will go away " - "when assertions are turned off.\n"); - } -#endif - old_size = heap->mem_alloc; - heap->mem_alloc += need_more; - heap->chunk = H5MM_xrealloc(heap->chunk, - H5H_SIZEOF_HDR(f) + heap->mem_alloc); - - /* clear new section so junk doesn't appear in the file */ - HDmemset(heap->chunk + H5H_SIZEOF_HDR(f) + old_size, 0, need_more); - } - /* - * Copy the data into the heap - */ - HDmemcpy(heap->chunk + H5H_SIZEOF_HDR(f) + offset, buf, buf_size); - FUNC_LEAVE(offset); -} - -/*------------------------------------------------------------------------- - * Function: H5H_write - * - * Purpose: Writes (overwrites) the object (or part of object) stored - * in BUF to the heap at file address ADDR in file F. The - * writing begins at byte offset OFFSET from the beginning of - * the heap and continues for SIZE bytes. - * - * Do not partially write an object to create it; the first - * write for an object must be for the entire object. - * - * If the heap address ADDR is the null pointer then - * the address comes from the H5F_t global heap field. - * - * Return: Success: SUCCEED - * - * Failure: FAIL - * - * Programmer: Robb Matzke - * matzke@llnl.gov - * Jul 16 1997 - * - * Modifications: - * - *------------------------------------------------------------------------- - */ -herr_t -H5H_write(H5F_t *f, const haddr_t *addr, size_t offset, size_t size, - const void *buf) -{ - H5H_t *heap = NULL; - - FUNC_ENTER(H5H_write, FAIL); - - /* check arguments */ - assert(f); - if (!addr) addr = &(f->shared->smallobj_addr); - assert(H5F_addr_defined(addr)); - assert(buf); - assert (offset==H5H_ALIGN (offset)); - - if (NULL == (heap = H5AC_find(f, H5AC_HEAP, addr, NULL, NULL))) { - HRETURN_ERROR(H5E_HEAP, H5E_CANTLOAD, FAIL, - "unable to load heap"); - } - assert(offset < heap->mem_alloc); - assert(offset + size <= heap->mem_alloc); - - heap->dirty += 1; - HDmemcpy(heap->chunk + H5H_SIZEOF_HDR(f) + offset, buf, size); - - FUNC_LEAVE(SUCCEED); -} - -/*------------------------------------------------------------------------- - * Function: H5H_remove - * - * Purpose: Removes an object or part of an object from the heap at - * address ADDR of file F. The object (or part) to remove - * begins at byte OFFSET from the beginning of the heap and - * continues for SIZE bytes. - * - * Once part of an object is removed, one must not attempt - * to access that part. Removing the beginning of an object - * results in the object OFFSET increasing by the amount - * truncated. Removing the end of an object results in - * object truncation. Removing the middle of an object results - * in two separate objects, one at the original offset and - * one at the first offset past the removed portion. - * - * If the heap address ADDR is the null pointer then - * the address comes from the H5F_t global heap field. - * - * Return: Success: SUCCEED - * - * Failure: FAIL - * - * Programmer: Robb Matzke - * matzke@llnl.gov - * Jul 16 1997 - * - * Modifications: - * - *------------------------------------------------------------------------- - */ -herr_t -H5H_remove(H5F_t *f, const haddr_t *addr, size_t offset, size_t size) -{ - H5H_t *heap = NULL; - H5H_free_t *fl = heap->freelist, *fl2 = NULL; -#ifndef NDEBUG - static int nmessages = 0; -#endif - - FUNC_ENTER(H5H_remove, FAIL); - - /* check arguments */ - assert(f); - if (!addr) addr = &(f->shared->smallobj_addr); - assert(H5F_addr_defined(addr)); - assert(size > 0); - assert (offset==H5H_ALIGN (offset)); - size = H5H_ALIGN (size); - - if (NULL == (heap = H5AC_find(f, H5AC_HEAP, addr, NULL, NULL))) { - HRETURN_ERROR(H5E_HEAP, H5E_CANTLOAD, FAIL, - "unable to load heap"); - } - assert(offset < heap->mem_alloc); - assert(offset + size <= heap->mem_alloc); - - heap->dirty += 1; - - /* - * Check if this chunk can be prepended or appended to an already - * free chunk. It might also fall between two chunks in such a way - * that all three chunks can be combined into one. - */ - while (fl) { - if (offset + size == fl->offset) { - fl->offset = offset; - fl->size += size; - assert (fl->offset==H5H_ALIGN (fl->offset)); - assert (fl->size==H5H_ALIGN (fl->size)); - fl2 = fl->next; - while (fl2) { - if (fl2->offset + fl2->size == fl->offset) { - fl->offset = fl2->offset; - fl->size += fl2->size; - assert (fl->offset==H5H_ALIGN (fl->offset)); - assert (fl->size==H5H_ALIGN (fl->size)); - fl2 = H5H_remove_free(heap, fl2); - HRETURN(SUCCEED); - } - } - HRETURN(SUCCEED); - - } else if (fl->offset + fl->size == offset) { - fl->size += size; - fl2 = fl->next; - assert (fl->size==H5H_ALIGN (fl->size)); - while (fl2) { - if (fl->offset + fl->size == fl2->offset) { - fl->size += fl2->size; - assert (fl->size==H5H_ALIGN (fl->size)); - fl2 = H5H_remove_free(heap, fl2); - HRETURN(SUCCEED); - } - } - HRETURN(SUCCEED); - } - fl = fl->next; - } - - /* - * The amount which is being removed must be large enough to - * hold the free list data. If not, the freed chunk is forever - * lost. - */ - if (size < H5H_SIZEOF_FREE(f)) { -#ifndef NDEBUG - fprintf(stderr, "H5H_remove: lost %lu bytes\n", (unsigned long) size); - if (0 == nmessages++) { - fprintf(stderr, "Messages from H5H_remove() will go away " - "when assertions are turned off.\n"); - } -#endif - HRETURN(SUCCEED); - } - /* - * Add an entry to the free list. - */ - fl = H5MM_xmalloc(sizeof(H5H_free_t)); - fl->offset = offset; - fl->size = size; - assert (fl->offset==H5H_ALIGN (fl->offset)); - assert (fl->size==H5H_ALIGN (fl->size)); - fl->prev = NULL; - fl->next = heap->freelist; - if (heap->freelist) heap->freelist->prev = fl; - heap->freelist = fl; - - FUNC_LEAVE(SUCCEED); -} - -/*------------------------------------------------------------------------- - * Function: H5H_debug - * - * Purpose: Prints debugging information about a heap. - * - * If the heap address ADDR is the null pointer then - * the address comes from the H5F_t global heap field. - * - * Return: Success: SUCCEED - * - * Failure: FAIL - * - * Programmer: Robb Matzke - * matzke@llnl.gov - * Aug 1 1997 - * - * Modifications: - * - *------------------------------------------------------------------------- - */ -herr_t -H5H_debug(H5F_t *f, const haddr_t *addr, FILE * stream, intn indent, - intn fwidth) -{ - H5H_t *h = NULL; - int i, j, overlap; - uint8 c; - H5H_free_t *freelist = NULL; - uint8 *marker = NULL; - size_t amount_free = 0; - - FUNC_ENTER(H5H_debug, FAIL); - - /* check arguments */ - assert(f); - if (!addr) - addr = &(f->shared->smallobj_addr); - assert(H5F_addr_defined(addr)); - assert(stream); - assert(indent >= 0); - assert(fwidth >= 0); - - if (NULL == (h = H5AC_find(f, H5AC_HEAP, addr, NULL, NULL))) { - HRETURN_ERROR(H5E_HEAP, H5E_CANTLOAD, FAIL, - "unable to load heap"); - } - fprintf(stream, "%*sHeap...\n", indent, ""); - fprintf(stream, "%*s%-*s %d\n", indent, "", fwidth, - "Dirty:", - (int) (h->dirty)); - fprintf(stream, "%*s%-*s %lu\n", indent, "", fwidth, - "Data bytes allocated on disk:", - (unsigned long) (h->disk_alloc)); - fprintf(stream, "%*s%-*s %lu\n", indent, "", fwidth, - "Data bytes allocated in core:", - (unsigned long) (h->mem_alloc)); - - /* - * Traverse the free list and check that all free blocks fall within - * the heap and that no two free blocks point to the same region of - * the heap. - */ - marker = H5MM_xcalloc(h->mem_alloc, 1); - for (freelist = h->freelist; freelist; freelist = freelist->next) { - fprintf(stream, "%*s%-*s %8lu, %8lu\n", indent, "", fwidth, - "Free Block (offset,size):", - (unsigned long) (freelist->offset), - (unsigned long) (freelist->size)); - if (freelist->offset + freelist->size > h->mem_alloc) { - fprintf(stream, "***THAT FREE BLOCK IS OUT OF BOUNDS!\n"); - } else { - for (i = overlap = 0; i < freelist->size; i++) { - if (marker[freelist->offset + i]) - overlap++; - marker[freelist->offset + i] = 1; - } - if (overlap) { - fprintf(stream, "***THAT FREE BLOCK OVERLAPPED A PREVIOUS ONE!\n"); - } else { - amount_free += freelist->size; - } - } - } - - if (h->mem_alloc) { - fprintf(stream, "%*s%-*s %lu\n", indent, "", fwidth, - "Percent of heap used:", - (unsigned long) (100 * (h->mem_alloc - amount_free) / - h->mem_alloc)); - } - /* - * Print the data in a VMS-style octal dump. - */ - fprintf(stream, "%*sData follows (`__' indicates free region)...\n", - indent, ""); - for (i = 0; i < h->disk_alloc; i += 16) { - fprintf(stream, "%*s %8d: ", indent, "", i); - for (j = 0; j < 16; j++) { - if (i + j < h->disk_alloc) { - if (marker[i + j]) { - fprintf(stream, "__ "); - } else { - c = h->chunk[H5H_SIZEOF_HDR(f) + i + j]; - fprintf(stream, "%02x ", c); - } - } else { - fprintf(stream, " "); - } - if (7 == j) - HDfputc(' ', stream); - } - - for (j = 0; j < 16; j++) { - if (i + j < h->disk_alloc) { - if (marker[i + j]) { - HDfputc(' ', stream); - } else { - c = h->chunk[H5H_SIZEOF_HDR(f) + i + j]; - if (c > ' ' && c < '~') - HDfputc(c, stream); - else - HDfputc('.', stream); - } - } - } - - HDfputc('\n', stream); - } - - H5MM_xfree(marker); - FUNC_LEAVE(SUCCEED); -} |