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;
+}