62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
/*
|
|
* Licensed under a two-clause BSD-style license.
|
|
* See LICENSE for details.
|
|
*/
|
|
|
|
#ifndef OBJ_POOL_H_
|
|
#define OBJ_POOL_H_
|
|
|
|
#include "git-compat-util.h"
|
|
|
|
#define MAYBE_UNUSED __attribute__((__unused__))
|
|
|
|
#define obj_pool_gen(pre, obj_t, initial_capacity) \
|
|
static struct { \
|
|
uint32_t committed; \
|
|
uint32_t size; \
|
|
uint32_t capacity; \
|
|
obj_t *base; \
|
|
} pre##_pool = {0, 0, 0, NULL}; \
|
|
static MAYBE_UNUSED uint32_t pre##_alloc(uint32_t count) \
|
|
{ \
|
|
uint32_t offset; \
|
|
if (pre##_pool.size + count > pre##_pool.capacity) { \
|
|
while (pre##_pool.size + count > pre##_pool.capacity) \
|
|
if (pre##_pool.capacity) \
|
|
pre##_pool.capacity *= 2; \
|
|
else \
|
|
pre##_pool.capacity = initial_capacity; \
|
|
pre##_pool.base = realloc(pre##_pool.base, \
|
|
pre##_pool.capacity * sizeof(obj_t)); \
|
|
} \
|
|
offset = pre##_pool.size; \
|
|
pre##_pool.size += count; \
|
|
return offset; \
|
|
} \
|
|
static MAYBE_UNUSED void pre##_free(uint32_t count) \
|
|
{ \
|
|
pre##_pool.size -= count; \
|
|
} \
|
|
static MAYBE_UNUSED uint32_t pre##_offset(obj_t *obj) \
|
|
{ \
|
|
return obj == NULL ? ~0 : obj - pre##_pool.base; \
|
|
} \
|
|
static MAYBE_UNUSED obj_t *pre##_pointer(uint32_t offset) \
|
|
{ \
|
|
return offset >= pre##_pool.size ? NULL : &pre##_pool.base[offset]; \
|
|
} \
|
|
static MAYBE_UNUSED void pre##_commit(void) \
|
|
{ \
|
|
pre##_pool.committed = pre##_pool.size; \
|
|
} \
|
|
static MAYBE_UNUSED void pre##_reset(void) \
|
|
{ \
|
|
free(pre##_pool.base); \
|
|
pre##_pool.base = NULL; \
|
|
pre##_pool.size = 0; \
|
|
pre##_pool.capacity = 0; \
|
|
pre##_pool.committed = 0; \
|
|
}
|
|
|
|
#endif
|