Source code
Revision control
Copy as Markdown
Other Tools
/*
* Copyright © 2018, VideoLAN and dav1d authors
* Copyright © 2018, Two Orioles, LLC
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <stdint.h>
#include "src/cpu.h"
#include "src/log.h"
#ifdef _WIN32
#include <windows.h>
#elif defined(__APPLE__)
#include <sys/sysctl.h>
#include <sys/types.h>
#else
#include <pthread.h>
#include <unistd.h>
#endif
#ifdef HAVE_PTHREAD_NP_H
#include <pthread_np.h>
#endif
#if defined(__FreeBSD__)
#define cpu_set_t cpuset_t
#endif
unsigned dav1d_cpu_flags = 0U;
unsigned dav1d_cpu_flags_mask = ~0U;
COLD void dav1d_init_cpu(void) {
#if HAVE_ASM && !__has_feature(memory_sanitizer)
// memory sanitizer is inherently incompatible with asm
#if ARCH_AARCH64 || ARCH_ARM
dav1d_cpu_flags = dav1d_get_cpu_flags_arm();
#elif ARCH_LOONGARCH
dav1d_cpu_flags = dav1d_get_cpu_flags_loongarch();
#elif ARCH_PPC64LE
dav1d_cpu_flags = dav1d_get_cpu_flags_ppc();
#elif ARCH_RISCV
dav1d_cpu_flags = dav1d_get_cpu_flags_riscv();
#elif ARCH_X86
dav1d_cpu_flags = dav1d_get_cpu_flags_x86();
#endif
#endif
}
COLD void dav1d_set_cpu_flags_mask(const unsigned mask) {
dav1d_cpu_flags_mask = mask;
}
COLD int dav1d_num_logical_processors(Dav1dContext *const c) {
#ifdef _WIN32
#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
GROUP_AFFINITY affinity;
if (GetThreadGroupAffinity(GetCurrentThread(), &affinity)) {
int num_processors = 1;
while (affinity.Mask &= affinity.Mask - 1)
num_processors++;
return num_processors;
}
#else
SYSTEM_INFO system_info;
GetNativeSystemInfo(&system_info);
return system_info.dwNumberOfProcessors;
#endif
#elif defined(HAVE_PTHREAD_GETAFFINITY_NP) && defined(CPU_COUNT)
cpu_set_t affinity;
if (!pthread_getaffinity_np(pthread_self(), sizeof(affinity), &affinity))
return CPU_COUNT(&affinity);
#elif defined(__APPLE__)
int num_processors;
size_t length = sizeof(num_processors);
if (!sysctlbyname("hw.logicalcpu", &num_processors, &length, NULL, 0))
return num_processors;
#elif defined(_SC_NPROCESSORS_ONLN)
return (int)sysconf(_SC_NPROCESSORS_ONLN);
#endif
if (c)
dav1d_log(c, "Unable to detect thread count, defaulting to single-threaded mode\n");
return 1;
}