1018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn/* 2018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn * Copyright (C) 2007-2016 The Android Open Source Project 3018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn * 4018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn * Licensed under the Apache License, Version 2.0 (the "License"); 5018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn * you may not use this file except in compliance with the License. 6018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn * You may obtain a copy of the License at 7018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn * 8018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn * http://www.apache.org/licenses/LICENSE-2.0 9018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn * 10018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn * Unless required by applicable law or agreed to in writing, software 11018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn * distributed under the License is distributed on an "AS IS" BASIS, 12018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn * See the License for the specific language governing permissions and 14018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn * limitations under the License. 15018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn */ 16018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn 17018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn/* 18018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn * Some OS specific dribs and drabs (locking etc). 19018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn */ 20018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn 21018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn#if !defined(_WIN32) 22018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn#include <pthread.h> 23018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn#endif 24018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn 25018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn#include "logger.h" 26018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn 27018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn#if !defined(_WIN32) 28018a96d03f0d452bf078084eedcd5693da42308dMark Salyzynstatic pthread_mutex_t log_init_lock = PTHREAD_MUTEX_INITIALIZER; 29018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn#endif 30018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn 312ed51d708eda64516ec79ac6397f690de38f0075Mark SalyzynLIBLOG_HIDDEN void __android_log_lock() { 32018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn#if !defined(_WIN32) 332ed51d708eda64516ec79ac6397f690de38f0075Mark Salyzyn /* 342ed51d708eda64516ec79ac6397f690de38f0075Mark Salyzyn * If we trigger a signal handler in the middle of locked activity and the 352ed51d708eda64516ec79ac6397f690de38f0075Mark Salyzyn * signal handler logs a message, we could get into a deadlock state. 362ed51d708eda64516ec79ac6397f690de38f0075Mark Salyzyn */ 372ed51d708eda64516ec79ac6397f690de38f0075Mark Salyzyn pthread_mutex_lock(&log_init_lock); 38018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn#endif 39018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn} 40018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn 412ed51d708eda64516ec79ac6397f690de38f0075Mark SalyzynLIBLOG_HIDDEN int __android_log_trylock() { 42018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn#if !defined(_WIN32) 432ed51d708eda64516ec79ac6397f690de38f0075Mark Salyzyn return pthread_mutex_trylock(&log_init_lock); 44018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn#else 452ed51d708eda64516ec79ac6397f690de38f0075Mark Salyzyn return 0; 46018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn#endif 47018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn} 48018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn 492ed51d708eda64516ec79ac6397f690de38f0075Mark SalyzynLIBLOG_HIDDEN void __android_log_unlock() { 50018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn#if !defined(_WIN32) 512ed51d708eda64516ec79ac6397f690de38f0075Mark Salyzyn pthread_mutex_unlock(&log_init_lock); 52018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn#endif 53018a96d03f0d452bf078084eedcd5693da42308dMark Salyzyn} 54