129 lines
3.9 KiB
C
129 lines
3.9 KiB
C
/*
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* Copyright © 2018, VideoLAN and dav1d authors
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* Copyright © 2018, Two Orioles, LLC
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include <errno.h>
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#include <stdint.h>
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#include "src/cpu.h"
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#include "src/log.h"
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#ifdef _WIN32
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#include <windows.h>
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#endif
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#ifdef __APPLE__
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#include <sys/sysctl.h>
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#include <sys/types.h>
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#endif
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if HAVE_PTHREAD_GETAFFINITY_NP
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#include <pthread.h>
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#if HAVE_PTHREAD_NP_H
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#include <pthread_np.h>
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#endif
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#if defined(__FreeBSD__)
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#define cpu_set_t cpuset_t
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#endif
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#endif
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#if HAVE_GETAUXVAL || HAVE_ELF_AUX_INFO
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#include <sys/auxv.h>
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#endif
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unsigned dav1d_cpu_flags = 0U;
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unsigned dav1d_cpu_flags_mask = ~0U;
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COLD void dav1d_init_cpu(void) {
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#if HAVE_ASM && !__has_feature(memory_sanitizer)
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// memory sanitizer is inherently incompatible with asm
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#if ARCH_AARCH64 || ARCH_ARM
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dav1d_cpu_flags = dav1d_get_cpu_flags_arm();
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#elif ARCH_LOONGARCH
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dav1d_cpu_flags = dav1d_get_cpu_flags_loongarch();
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#elif ARCH_PPC64LE
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dav1d_cpu_flags = dav1d_get_cpu_flags_ppc();
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#elif ARCH_RISCV
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dav1d_cpu_flags = dav1d_get_cpu_flags_riscv();
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#elif ARCH_X86
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dav1d_cpu_flags = dav1d_get_cpu_flags_x86();
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#endif
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#endif
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}
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COLD void dav1d_set_cpu_flags_mask(const unsigned mask) {
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dav1d_cpu_flags_mask = mask;
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}
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COLD int dav1d_num_logical_processors(Dav1dContext *const c) {
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#ifdef _WIN32
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#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
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GROUP_AFFINITY affinity;
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if (GetThreadGroupAffinity(GetCurrentThread(), &affinity)) {
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int num_processors = 1;
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while (affinity.Mask &= affinity.Mask - 1)
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num_processors++;
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return num_processors;
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}
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#else
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SYSTEM_INFO system_info;
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GetNativeSystemInfo(&system_info);
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return system_info.dwNumberOfProcessors;
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#endif
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#elif HAVE_PTHREAD_GETAFFINITY_NP && defined(CPU_COUNT)
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cpu_set_t affinity;
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if (!pthread_getaffinity_np(pthread_self(), sizeof(affinity), &affinity))
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return CPU_COUNT(&affinity);
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#elif defined(__APPLE__)
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int num_processors;
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size_t length = sizeof(num_processors);
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if (!sysctlbyname("hw.logicalcpu", &num_processors, &length, NULL, 0))
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return num_processors;
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#elif defined(_SC_NPROCESSORS_ONLN)
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return (int)sysconf(_SC_NPROCESSORS_ONLN);
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#endif
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if (c)
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dav1d_log(c, "Unable to detect thread count, defaulting to single-threaded mode\n");
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return 1;
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}
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COLD unsigned long dav1d_getauxval(unsigned long type) {
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#if HAVE_GETAUXVAL
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return getauxval(type);
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#elif HAVE_ELF_AUX_INFO
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unsigned long aux = 0;
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int ret = elf_aux_info(type, &aux, sizeof(aux));
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if (ret != 0)
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errno = ret;
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return aux;
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#else
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errno = ENOSYS;
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return 0;
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#endif
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}
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