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