minetest.git - modified minetest for gpcfs purposes

	Commit message (Expand)	Author	Age
*	Compress textures	David Gumberg	2013-06-18
*	Move games/minetest to games/minimal and update README.txt	Perttu Ahola	2012-03-26

/* Minetest Copyright (C) 2013 sapier, < sapier AT gmx DOT net > This program is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include <assert.h> #include <errno.h> #include <sys/time.h> #include "jthread/jsemaphore.h" #if defined(__MACH__) && defined(__APPLE__) #include <unistd.h> #endif #define UNUSED(expr) do { (void)(expr); } while (0) #if defined(__MACH__) && defined(__APPLE__) #undef sem_t #undef sem_init #undef sem_wait #undef sem_post #undef sem_destroy #define sem_t semaphore_t #define sem_init(s, p, c) semaphore_create(mach_task_self(), (s), 0, (c)) #define sem_wait(s) semaphore_wait(*(s)) #define sem_post(s) semaphore_signal(*(s)) #define sem_destroy(s) semaphore_destroy(mach_task_self(), *(s)) pthread_mutex_t semcount_mutex; #endif JSemaphore::JSemaphore() { int sem_init_retval = sem_init(&m_semaphore,0,0); assert(sem_init_retval == 0); UNUSED(sem_init_retval); #if defined(__MACH__) && defined(__APPLE__) semcount = 0; #endif } JSemaphore::~JSemaphore() { int sem_destroy_retval = sem_destroy(&m_semaphore); #ifdef __ANDROID__ // WORKAROUND for broken bionic semaphore implementation! assert( (sem_destroy_retval == 0) || (errno == EBUSY) ); #else assert(sem_destroy_retval == 0); #endif UNUSED(sem_destroy_retval); } JSemaphore::JSemaphore(int initval) { int sem_init_retval = sem_init(&m_semaphore,0,initval); assert(sem_init_retval == 0); UNUSED(sem_init_retval); } void JSemaphore::Post() { int sem_post_retval = sem_post(&m_semaphore); assert(sem_post_retval == 0); UNUSED(sem_post_retval); #if defined(__MACH__) && defined(__APPLE__) pthread_mutex_lock(&semcount_mutex); semcount++; pthread_mutex_unlock(&semcount_mutex); #endif } void JSemaphore::Wait() { int sem_wait_retval = sem_wait(&m_semaphore); assert(sem_wait_retval == 0); UNUSED(sem_wait_retval); #if defined(__MACH__) && defined(__APPLE__) pthread_mutex_lock(&semcount_mutex); semcount--; pthread_mutex_unlock(&semcount_mutex); #endif } bool JSemaphore::Wait(unsigned int time_ms) { #if defined(__MACH__) && defined(__APPLE__) mach_timespec_t waittime; waittime.tv_sec = time_ms / 1000; waittime.tv_nsec = 1000000 * (time_ms % 1000); #else struct timespec waittime; #endif struct timeval now; if (gettimeofday(&now, NULL) == -1) { assert("Unable to get time by clock_gettime!" == 0); return false; } #if !(defined(__MACH__) && defined(__APPLE__)) waittime.tv_nsec = ((time_ms % 1000) * 1000 * 1000) + (now.tv_usec * 1000); waittime.tv_sec = (time_ms / 1000) + (waittime.tv_nsec / (1000*1000*1000)) + now.tv_sec; waittime.tv_nsec %= 1000*1000*1000; #endif errno = 0; #if defined(__MACH__) && defined(__APPLE__) int sem_wait_retval = semaphore_timedwait(m_semaphore, waittime); if (sem_wait_retval == KERN_OPERATION_TIMED_OUT) { errno = ETIMEDOUT; } else if (sem_wait_retval == KERN_ABORTED) { errno = EINTR; } else if (sem_wait_retval != 0) { errno = EINVAL; } #else int sem_wait_retval = sem_timedwait(&m_semaphore, &waittime); #endif if (sem_wait_retval == 0) { #if defined(__MACH__) && defined(__APPLE__) pthread_mutex_lock(&semcount_mutex); semcount--; pthread_mutex_unlock(&semcount_mutex); #endif return true; } else { assert((errno == ETIMEDOUT) || (errno == EINTR)); return false; } return sem_wait_retval == 0 ? true : false; } int JSemaphore::GetValue() { int retval = 0; #if defined(__MACH__) && defined(__APPLE__) pthread_mutex_lock(&semcount_mutex); retval = semcount; pthread_mutex_unlock(&semcount_mutex); #else sem_getvalue(&m_semaphore, &retval); #endif return retval; }