mirror of
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136 lines
4.1 KiB
C
136 lines
4.1 KiB
C
#ifndef THREADS_H_
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#define THREADS_H_
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/*****************************************************************************
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* This file is part of Kvazaar HEVC encoder.
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*
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* Copyright (C) 2013-2015 Tampere University of Technology and others (see
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* COPYING file).
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*
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* Kvazaar is free software: you can redistribute it and/or modify it under
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* the terms of the GNU Lesser General Public License as published by the
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* Free Software Foundation; either version 2.1 of the License, or (at your
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* option) any later version.
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*
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* Kvazaar is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with Kvazaar. If not, see <http://www.gnu.org/licenses/>.
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****************************************************************************/
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/**
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* \ingroup Threading
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* \file
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* Abstractions for operating system specific stuff.
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*/
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#include "global.h" // IWYU pragma: keep
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#include <pthread.h>
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#if defined(__GNUC__) && !defined(__MINGW32__)
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#include <unistd.h> // IWYU pragma: export
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#include <time.h> // IWYU pragma: export
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#define KVZ_CLOCK_T struct timespec
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#ifdef __MACH__
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// Workaround Mac OS not having clock_gettime.
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// This needs to work with pthread_cond_timedwait.
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# include <sys/time.h>
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# define KVZ_GET_TIME(clock_t) { \
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struct timeval tv; \
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gettimeofday(&tv, NULL); \
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(clock_t)->tv_sec = tv.tv_sec; \
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(clock_t)->tv_nsec = tv.tv_usec * 1000; \
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}
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#else
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# define KVZ_GET_TIME(clock_t) { clock_gettime(CLOCK_MONOTONIC, (clock_t)); }
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#endif
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#define KVZ_CLOCK_T_AS_DOUBLE(ts) ((double)((ts).tv_sec) + (double)((ts).tv_nsec) / 1e9)
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#define KVZ_CLOCK_T_DIFF(start, stop) ((double)((stop).tv_sec - (start).tv_sec) + (double)((stop).tv_nsec - (start).tv_nsec) / 1e9)
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#define KVZ_ATOMIC_INC(ptr) __sync_add_and_fetch((volatile int32_t*)ptr, 1)
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#define KVZ_ATOMIC_DEC(ptr) __sync_add_and_fetch((volatile int32_t*)ptr, -1)
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#else //__GNUC__
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//TODO: we assume !GCC => Windows... this may be bad
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#include <windows.h> // IWYU pragma: export
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#define KVZ_CLOCK_T struct _FILETIME
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#define KVZ_GET_TIME(clock_t) { GetSystemTimeAsFileTime(clock_t); }
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// _FILETIME has 32bit low and high part of 64bit 100ns resolution timestamp (since 12:00 AM January 1, 1601)
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#define KVZ_CLOCK_T_AS_DOUBLE(ts) ((double)(((uint64_t)(ts).dwHighDateTime)<<32 | (uint64_t)(ts).dwLowDateTime) / 1e7)
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#define KVZ_CLOCK_T_DIFF(start, stop) ((double)((((uint64_t)(stop).dwHighDateTime)<<32 | (uint64_t)(stop).dwLowDateTime) - \
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(((uint64_t)(start).dwHighDateTime)<<32 | (uint64_t)(start).dwLowDateTime)) / 1e7)
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#define KVZ_ATOMIC_INC(ptr) InterlockedIncrement((volatile LONG*)ptr)
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#define KVZ_ATOMIC_DEC(ptr) InterlockedDecrement((volatile LONG*)ptr)
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#endif //__GNUC__
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#ifdef __APPLE__
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// POSIX semaphores are deprecated on Mac so we use Grand Central Dispatch
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// semaphores instead.
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#include <dispatch/dispatch.h>
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typedef dispatch_semaphore_t kvz_sem_t;
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static INLINE void kvz_sem_init(kvz_sem_t *sem, int value)
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{
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assert(value >= 0);
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*sem = dispatch_semaphore_create(value);
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}
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static INLINE void kvz_sem_wait(kvz_sem_t *sem)
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{
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dispatch_semaphore_wait(*sem, DISPATCH_TIME_FOREVER);
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}
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static INLINE void kvz_sem_post(kvz_sem_t *sem)
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{
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dispatch_semaphore_signal(*sem);
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}
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static INLINE void kvz_sem_destroy(kvz_sem_t *sem)
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{
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// Do nothing for GCD semaphores.
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}
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#else
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// Use POSIX semaphores.
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#include <semaphore.h>
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typedef sem_t kvz_sem_t;
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static INLINE void kvz_sem_init(kvz_sem_t *sem, int value)
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{
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assert(value >= 0);
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// Pthreads-w32 does not support process-shared semaphores, so pshared
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// must always be zero.
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int pshared = 0;
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sem_init(sem, pshared, value);
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}
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static INLINE void kvz_sem_wait(kvz_sem_t *sem)
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{
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sem_wait(sem);
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}
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static INLINE void kvz_sem_post(kvz_sem_t *sem)
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{
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sem_post(sem);
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}
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static INLINE void kvz_sem_destroy(kvz_sem_t *sem)
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{
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sem_destroy(sem);
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}
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#endif
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#endif //THREADS_H_
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