/* * Copyright (c) 2016, ARM Limited, All Rights Reserved * SPDX-License-Identifier: Apache-2.0 * * Licensed under the Apache License, Version 2.0 (the "License"); you may * not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef __UVISOR_API_UVISOR_SEMAPHORE_H__ #define __UVISOR_API_UVISOR_SEMAPHORE_H__ #include "api/inc/uvisor_semaphore_exports.h" /* Initialize a semaphore with the specified initial count. This function is * not safe to call from interrupt context. */ UVISOR_EXTERN int __uvisor_semaphore_init(UvisorSemaphore * semaphore, uint32_t initial_count, uint32_t max_count); /* This function is not safe to call from interrupt context, even if the * timeout is zero. */ UVISOR_EXTERN int __uvisor_semaphore_pend(UvisorSemaphore * semaphore, uint32_t timeout_ms); /* This function is safe to call from interrupt context. */ UVISOR_EXTERN int __uvisor_semaphore_post(UvisorSemaphore * semaphore); #endif