MySQL 8.4.3
Source Code Documentation
buf0buddy.h
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28/** @file include/buf0buddy.h
29 Binary buddy allocator for compressed pages
30
31 Created December 2006 by Marko Makela
32 *******************************************************/
33
34#ifndef buf0buddy_h
35#define buf0buddy_h
36
37#include "buf0types.h"
38#include "univ.i"
39
40/** Allocate a block. This function should only be used for allocating
41compressed page frames. The thread calling this function must hold
42buf_pool->LRU_list_mutex and must not hold buf_pool->zip_mutex or any
43block->mutex.
44@param[in,out] buf_pool buffer pool in which the page resides
45@param[in] size compressed page size, between
46 UNIV_ZIP_SIZE_MIN and UNIV_PAGE_SIZE
47@return allocated block, never NULL */
48static inline byte *buf_buddy_alloc(buf_pool_t *buf_pool, ulint size)
49 MY_ATTRIBUTE((malloc));
50
51/** Deallocate a block.
52@param[in,out] buf_pool buffer pool in which the block resides
53@param[in] buf block to be freed, must not be pointed to
54 by the buffer pool
55@param[in] size block size, up to UNIV_PAGE_SIZE */
56static inline void buf_buddy_free(buf_pool_t *buf_pool, void *buf, ulint size);
57
58/** Try to reallocate a block.
59@param[in] buf_pool buffer pool instance
60@param[in] buf block to be reallocated, must be pointed
61to by the buffer pool
62@param[in] size block size, up to UNIV_PAGE_SIZE
63@retval true if succeeded or if failed because the block was fixed
64@retval false if failed because of no free blocks. */
65bool buf_buddy_realloc(buf_pool_t *buf_pool, void *buf, ulint size);
66
67/** Combine all pairs of free buddies.
68@param[in] buf_pool buffer pool instance */
70
71#include "buf0buddy.ic"
72
73#endif /* buf0buddy_h */
bool buf_buddy_realloc(buf_pool_t *buf_pool, void *buf, ulint size)
Try to reallocate a block.
Definition: buf0buddy.cc:705
void buf_buddy_condense_free(buf_pool_t *buf_pool)
Combine all pairs of free buddies.
Definition: buf0buddy.cc:762
static byte * buf_buddy_alloc(buf_pool_t *buf_pool, ulint size)
Allocate a block.
static void buf_buddy_free(buf_pool_t *buf_pool, void *buf, ulint size)
Deallocate a block.
Binary buddy allocator for compressed pages.
The database buffer pool global types for the directory.
#define malloc(A)
Definition: lexyy.cc:914
Definition: buf0block_hint.cc:30
size_t size(const char *const c)
Definition: base64.h:46
The buffer pool structure.
Definition: buf0buf.h:2275
Version control for database, common definitions, and include files.
unsigned long int ulint
Definition: univ.i:406