blob: d51bf76f2aac19fe794ebf11d4b998af5b7690b9 [file] [log] [blame]
/*
* Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include "pico/critical_section.h"
#if PICO_32BIT
static_assert(sizeof(critical_section_t) == 8, "");
#endif
void critical_section_init(critical_section_t *crit_sec) {
critical_section_init_with_lock_num(crit_sec, (uint)spin_lock_claim_unused(true));
}
void critical_section_init_with_lock_num(critical_section_t *crit_sec, uint lock_num) {
crit_sec->spin_lock = spin_lock_instance(lock_num);
__mem_fence_release();
}
void critical_section_deinit(critical_section_t *crit_sec) {
spin_lock_unclaim(spin_lock_get_num(crit_sec->spin_lock));
crit_sec->spin_lock = NULL;
}