GNU libmicrohttpd
0.9.29
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memory pool More...
#include "memorypool.h"
Go to the source code of this file.
Macros | |
#define | MAP_FAILED ((void*)-1) |
#define | ALIGN_SIZE (2 * sizeof(void*)) |
#define | ROUND_TO_ALIGN(n) ((n+(ALIGN_SIZE-1)) & (~(ALIGN_SIZE-1))) |
Functions | |
struct MemoryPool * | MHD_pool_create (size_t max) |
void | MHD_pool_destroy (struct MemoryPool *pool) |
size_t | MHD_pool_get_free (struct MemoryPool *pool) |
void * | MHD_pool_allocate (struct MemoryPool *pool, size_t size, int from_end) |
void * | MHD_pool_reallocate (struct MemoryPool *pool, void *old, size_t old_size, size_t new_size) |
void * | MHD_pool_reset (struct MemoryPool *pool, void *keep, size_t copy_bytes, size_t new_size) |
memory pool
Definition in file memorypool.c.
#define ALIGN_SIZE (2 * sizeof(void*)) |
Align to 2x word size (as GNU libc does).
Definition at line 38 of file memorypool.c.
#define MAP_FAILED ((void*)-1) |
Definition at line 32 of file memorypool.c.
Referenced by MHD_pool_create().
#define ROUND_TO_ALIGN | ( | n | ) | ((n+(ALIGN_SIZE-1)) & (~(ALIGN_SIZE-1))) |
Round up 'n' to a multiple of ALIGN_SIZE.
Definition at line 43 of file memorypool.c.
Referenced by MHD_pool_allocate(), MHD_pool_reallocate(), and MHD_pool_reset().
void* MHD_pool_allocate | ( | struct MemoryPool * | pool, |
size_t | size, | ||
int | from_end | ||
) |
Allocate size bytes from the pool.
pool | memory pool to use for the operation |
size | number of bytes to allocate |
from_end | allocate from end of pool (set to MHD_YES); use this for small, persistent allocations that will never be reallocated |
Definition at line 188 of file memorypool.c.
References MHD_YES, NULL, and ROUND_TO_ALIGN.
Referenced by build_header_response(), MHD_create_response_from_buffer(), MHD_set_connection_value(), parse_cookie_header(), and try_ready_chunked_body().
struct MemoryPool* MHD_pool_create | ( | size_t | max | ) |
Create a memory pool.
max | maximum size of the pool |
Definition at line 87 of file memorypool.c.
References MAP_FAILED, MHD_NO, MHD_YES, and NULL.
Referenced by internal_add_connection().
void MHD_pool_destroy | ( | struct MemoryPool * | pool | ) |
Destroy a memory pool.
pool | memory pool to destroy |
Definition at line 142 of file memorypool.c.
Referenced by internal_add_connection(), MHD_cleanup_connections(), and MHD_connection_handle_idle().
size_t MHD_pool_get_free | ( | struct MemoryPool * | pool | ) |
Check how much memory is left in the pool
pool | pool to check |
Definition at line 170 of file memorypool.c.
Referenced by MHD_create_response_from_buffer().
void* MHD_pool_reallocate | ( | struct MemoryPool * | pool, |
void * | old, | ||
size_t | old_size, | ||
size_t | new_size | ||
) |
Reallocate a block of memory obtained from the pool. This is particularly efficient when growing or shrinking the block that was last (re)allocated. If the given block is not the most recently (re)allocated block, the memory of the previous allocation may be leaked until the pool is destroyed (and copying the data maybe required).
pool | memory pool to use for the operation |
old | the existing block |
old_size | the size of the existing block |
new_size | the new size of the block |
Definition at line 233 of file memorypool.c.
References NULL, and ROUND_TO_ALIGN.
Referenced by check_write_done(), MHD_connection_handle_read(), process_broken_line(), and try_grow_read_buffer().
void* MHD_pool_reset | ( | struct MemoryPool * | pool, |
void * | keep, | ||
size_t | copy_bytes, | ||
size_t | new_size | ||
) |
Clear all entries from the memory pool except for keep of the given size. The pointer returned should be a buffer of new_size where the first copy_bytes are from keep.
pool | memory pool to use for the operation |
keep | pointer to the entry to keep (maybe NULL) |
copy_bytes | how many bytes need to be kept at this address |
new_size | how many bytes should the allocation we return have? (should be larger or equal to copy_bytes) |
Definition at line 299 of file memorypool.c.
References NULL, and ROUND_TO_ALIGN.
Referenced by MHD_connection_handle_idle().