13c827367444ee418f129b2c238299f49d3264554Jarkko Poyry/*------------------------------------------------------------------------- 23c827367444ee418f129b2c238299f49d3264554Jarkko Poyry * drawElements Thread Library 33c827367444ee418f129b2c238299f49d3264554Jarkko Poyry * --------------------------- 43c827367444ee418f129b2c238299f49d3264554Jarkko Poyry * 53c827367444ee418f129b2c238299f49d3264554Jarkko Poyry * Copyright 2014 The Android Open Source Project 63c827367444ee418f129b2c238299f49d3264554Jarkko Poyry * 73c827367444ee418f129b2c238299f49d3264554Jarkko Poyry * Licensed under the Apache License, Version 2.0 (the "License"); 83c827367444ee418f129b2c238299f49d3264554Jarkko Poyry * you may not use this file except in compliance with the License. 93c827367444ee418f129b2c238299f49d3264554Jarkko Poyry * You may obtain a copy of the License at 103c827367444ee418f129b2c238299f49d3264554Jarkko Poyry * 113c827367444ee418f129b2c238299f49d3264554Jarkko Poyry * http://www.apache.org/licenses/LICENSE-2.0 123c827367444ee418f129b2c238299f49d3264554Jarkko Poyry * 133c827367444ee418f129b2c238299f49d3264554Jarkko Poyry * Unless required by applicable law or agreed to in writing, software 143c827367444ee418f129b2c238299f49d3264554Jarkko Poyry * distributed under the License is distributed on an "AS IS" BASIS, 153c827367444ee418f129b2c238299f49d3264554Jarkko Poyry * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 163c827367444ee418f129b2c238299f49d3264554Jarkko Poyry * See the License for the specific language governing permissions and 173c827367444ee418f129b2c238299f49d3264554Jarkko Poyry * limitations under the License. 183c827367444ee418f129b2c238299f49d3264554Jarkko Poyry * 193c827367444ee418f129b2c238299f49d3264554Jarkko Poyry *//*! 203c827367444ee418f129b2c238299f49d3264554Jarkko Poyry * \file 213c827367444ee418f129b2c238299f49d3264554Jarkko Poyry * \brief Unix implementation of semaphore. 223c827367444ee418f129b2c238299f49d3264554Jarkko Poyry *//*--------------------------------------------------------------------*/ 233c827367444ee418f129b2c238299f49d3264554Jarkko Poyry 243c827367444ee418f129b2c238299f49d3264554Jarkko Poyry#include "deSemaphore.h" 253c827367444ee418f129b2c238299f49d3264554Jarkko Poyry 263c827367444ee418f129b2c238299f49d3264554Jarkko Poyry#if (DE_OS == DE_OS_UNIX || DE_OS == DE_OS_ANDROID || DE_OS == DE_OS_SYMBIAN) 273c827367444ee418f129b2c238299f49d3264554Jarkko Poyry 283c827367444ee418f129b2c238299f49d3264554Jarkko Poyry#include "deMemory.h" 293c827367444ee418f129b2c238299f49d3264554Jarkko Poyry 303c827367444ee418f129b2c238299f49d3264554Jarkko Poyry#include <semaphore.h> 313c827367444ee418f129b2c238299f49d3264554Jarkko Poyry 323c827367444ee418f129b2c238299f49d3264554Jarkko PoyryDE_STATIC_ASSERT(sizeof(deSemaphore) >= sizeof(sem_t*)); 333c827367444ee418f129b2c238299f49d3264554Jarkko Poyry 343c827367444ee418f129b2c238299f49d3264554Jarkko PoyrydeSemaphore deSemaphore_create (int initialValue, const deSemaphoreAttributes* attributes) 353c827367444ee418f129b2c238299f49d3264554Jarkko Poyry{ 363c827367444ee418f129b2c238299f49d3264554Jarkko Poyry sem_t* sem = (sem_t*)deMalloc(sizeof(sem_t)); 373c827367444ee418f129b2c238299f49d3264554Jarkko Poyry 383c827367444ee418f129b2c238299f49d3264554Jarkko Poyry DE_UNREF(attributes); 393c827367444ee418f129b2c238299f49d3264554Jarkko Poyry 403c827367444ee418f129b2c238299f49d3264554Jarkko Poyry if (!sem) 413c827367444ee418f129b2c238299f49d3264554Jarkko Poyry return 0; 423c827367444ee418f129b2c238299f49d3264554Jarkko Poyry 433c827367444ee418f129b2c238299f49d3264554Jarkko Poyry if (sem_init(sem, 0, initialValue) != 0) 443c827367444ee418f129b2c238299f49d3264554Jarkko Poyry { 453c827367444ee418f129b2c238299f49d3264554Jarkko Poyry deFree(sem); 463c827367444ee418f129b2c238299f49d3264554Jarkko Poyry return 0; 473c827367444ee418f129b2c238299f49d3264554Jarkko Poyry } 483c827367444ee418f129b2c238299f49d3264554Jarkko Poyry 493c827367444ee418f129b2c238299f49d3264554Jarkko Poyry return (deSemaphore)sem; 503c827367444ee418f129b2c238299f49d3264554Jarkko Poyry} 513c827367444ee418f129b2c238299f49d3264554Jarkko Poyry 523c827367444ee418f129b2c238299f49d3264554Jarkko Poyryvoid deSemaphore_destroy (deSemaphore semaphore) 533c827367444ee418f129b2c238299f49d3264554Jarkko Poyry{ 543c827367444ee418f129b2c238299f49d3264554Jarkko Poyry sem_t* sem = (sem_t*)semaphore; 553c827367444ee418f129b2c238299f49d3264554Jarkko Poyry DE_ASSERT(sem); 563c827367444ee418f129b2c238299f49d3264554Jarkko Poyry sem_destroy(sem); 573c827367444ee418f129b2c238299f49d3264554Jarkko Poyry deFree(sem); 583c827367444ee418f129b2c238299f49d3264554Jarkko Poyry} 593c827367444ee418f129b2c238299f49d3264554Jarkko Poyry 603c827367444ee418f129b2c238299f49d3264554Jarkko Poyryvoid deSemaphore_increment (deSemaphore semaphore) 613c827367444ee418f129b2c238299f49d3264554Jarkko Poyry{ 623c827367444ee418f129b2c238299f49d3264554Jarkko Poyry sem_t* sem = (sem_t*)semaphore; 633c827367444ee418f129b2c238299f49d3264554Jarkko Poyry int ret = sem_post(sem); 643c827367444ee418f129b2c238299f49d3264554Jarkko Poyry DE_ASSERT(ret == 0); 653c827367444ee418f129b2c238299f49d3264554Jarkko Poyry DE_UNREF(ret); 663c827367444ee418f129b2c238299f49d3264554Jarkko Poyry} 673c827367444ee418f129b2c238299f49d3264554Jarkko Poyry 683c827367444ee418f129b2c238299f49d3264554Jarkko Poyryvoid deSemaphore_decrement (deSemaphore semaphore) 693c827367444ee418f129b2c238299f49d3264554Jarkko Poyry{ 703c827367444ee418f129b2c238299f49d3264554Jarkko Poyry sem_t* sem = (sem_t*)semaphore; 713c827367444ee418f129b2c238299f49d3264554Jarkko Poyry int ret = sem_wait(sem); 723c827367444ee418f129b2c238299f49d3264554Jarkko Poyry DE_ASSERT(ret == 0); 733c827367444ee418f129b2c238299f49d3264554Jarkko Poyry DE_UNREF(ret); 743c827367444ee418f129b2c238299f49d3264554Jarkko Poyry} 753c827367444ee418f129b2c238299f49d3264554Jarkko Poyry 763c827367444ee418f129b2c238299f49d3264554Jarkko PoyrydeBool deSemaphore_tryDecrement (deSemaphore semaphore) 773c827367444ee418f129b2c238299f49d3264554Jarkko Poyry{ 783c827367444ee418f129b2c238299f49d3264554Jarkko Poyry sem_t* sem = (sem_t*)semaphore; 793c827367444ee418f129b2c238299f49d3264554Jarkko Poyry DE_ASSERT(sem); 803c827367444ee418f129b2c238299f49d3264554Jarkko Poyry return (sem_trywait(sem) == 0); 813c827367444ee418f129b2c238299f49d3264554Jarkko Poyry} 823c827367444ee418f129b2c238299f49d3264554Jarkko Poyry 833c827367444ee418f129b2c238299f49d3264554Jarkko Poyry#endif /* DE_OS */ 84