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Diffstat (limited to '')
-rw-r--r-- | third_party/dav1d/src/cpu.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/third_party/dav1d/src/cpu.c b/third_party/dav1d/src/cpu.c new file mode 100644 index 0000000000..d24148c352 --- /dev/null +++ b/third_party/dav1d/src/cpu.c @@ -0,0 +1,101 @@ +/* + * 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_PPC64LE + dav1d_cpu_flags = dav1d_get_cpu_flags_ppc(); +#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; +} |