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// SPDX-License-Identifier: GPL-2.0
#include "sharded_mutex.h"
#include <stdlib.h>
struct sharded_mutex *sharded_mutex__new(size_t num_shards)
{
struct sharded_mutex *result;
size_t size;
unsigned int bits;
for (bits = 0; ((size_t)1 << bits) < num_shards; bits++)
;
size = sizeof(*result) + sizeof(struct mutex) * (1 << bits);
result = malloc(size);
if (!result)
return NULL;
result->cap_bits = bits;
for (size_t i = 0; i < ((size_t)1 << bits); i++)
mutex_init(&result->mutexes[i]);
return result;
}
void sharded_mutex__delete(struct sharded_mutex *sm)
{
for (size_t i = 0; i < ((size_t)1 << sm->cap_bits); i++)
mutex_destroy(&sm->mutexes[i]);
free(sm);
}
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