src/common/pico_sync/critical_section.c (PicoSDK)

/* * 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; }