1 files changed, 172 insertions, 0 deletions
diff --git a/third_party/aom/aom_util/aom_pthread.h b/third_party/aom/aom_util/aom_pthread.h
new file mode 100644
index 0000000000..99deeb292a
--- /dev/null
+++ b/third_party/aom/aom_util/aom_pthread.h
@@ -0,0 +1,172 @@
+/*
+ * Copyright (c) 2024, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+//
+// pthread.h wrapper
+
+#ifndef AOM_AOM_UTIL_AOM_PTHREAD_H_
+#define AOM_AOM_UTIL_AOM_PTHREAD_H_
+
+#include "config/aom_config.h"
+
+#if CONFIG_MULTITHREAD
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if defined(_WIN32) && !HAVE_PTHREAD_H
+// Prevent leaking max/min macros.
+#undef NOMINMAX
+#define NOMINMAX
+#undef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#include <process.h>  // NOLINT
+#include <stddef.h>   // NOLINT
+#include <windows.h>  // NOLINT
+typedef HANDLE pthread_t;
+typedef int pthread_attr_t;
+typedef CRITICAL_SECTION pthread_mutex_t;
+
+#include <errno.h>
+
+#if _WIN32_WINNT < 0x0600
+#error _WIN32_WINNT must target Windows Vista / Server 2008 or newer.
+#endif
+typedef CONDITION_VARIABLE pthread_cond_t;
+
+#ifndef WINAPI_FAMILY_PARTITION
+#define WINAPI_PARTITION_DESKTOP 1
+#define WINAPI_FAMILY_PARTITION(x) x
+#endif
+
+#if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
+#define USE_CREATE_THREAD
+#endif
+
+//------------------------------------------------------------------------------
+// simplistic pthread emulation layer
+
+// _beginthreadex requires __stdcall
+#if defined(__GNUC__) && \
+    (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 2))
+#define THREADFN __attribute__((force_align_arg_pointer)) unsigned int __stdcall
+#else
+#define THREADFN unsigned int __stdcall
+#endif
+#define THREAD_EXIT_SUCCESS 0
+
+static INLINE int pthread_attr_init(pthread_attr_t *attr) {
+  (void)attr;
+  return 0;
+}
+
+static INLINE int pthread_attr_destroy(pthread_attr_t *attr) {
+  (void)attr;
+  return 0;
+}
+
+static INLINE int pthread_create(pthread_t *const thread,
+                                 const pthread_attr_t *attr,
+                                 unsigned int(__stdcall *start)(void *),
+                                 void *arg) {
+  (void)attr;
+#ifdef USE_CREATE_THREAD
+  *thread = CreateThread(NULL,          /* lpThreadAttributes */
+                         0,             /* dwStackSize */
+                         start, arg, 0, /* dwStackSize */
+                         NULL);         /* lpThreadId */
+#else
+  *thread = (pthread_t)_beginthreadex(NULL,          /* void *security */
+                                      0,             /* unsigned stack_size */
+                                      start, arg, 0, /* unsigned initflag */
+                                      NULL);         /* unsigned *thrdaddr */
+#endif
+  if (*thread == NULL) return 1;
+  SetThreadPriority(*thread, THREAD_PRIORITY_ABOVE_NORMAL);
+  return 0;
+}
+
+static INLINE int pthread_join(pthread_t thread, void **value_ptr) {
+  (void)value_ptr;
+  return (WaitForSingleObjectEx(thread, INFINITE, FALSE /*bAlertable*/) !=
+              WAIT_OBJECT_0 ||
+          CloseHandle(thread) == 0);
+}
+
+// Mutex
+static INLINE int pthread_mutex_init(pthread_mutex_t *const mutex,
+                                     void *mutexattr) {
+  (void)mutexattr;
+  InitializeCriticalSectionEx(mutex, 0 /*dwSpinCount*/, 0 /*Flags*/);
+  return 0;
+}
+
+static INLINE int pthread_mutex_trylock(pthread_mutex_t *const mutex) {
+  return TryEnterCriticalSection(mutex) ? 0 : EBUSY;
+}
+
+static INLINE int pthread_mutex_lock(pthread_mutex_t *const mutex) {
+  EnterCriticalSection(mutex);
+  return 0;
+}
+
+static INLINE int pthread_mutex_unlock(pthread_mutex_t *const mutex) {
+  LeaveCriticalSection(mutex);
+  return 0;
+}
+
+static INLINE int pthread_mutex_destroy(pthread_mutex_t *const mutex) {
+  DeleteCriticalSection(mutex);
+  return 0;
+}
+
+// Condition
+static INLINE int pthread_cond_destroy(pthread_cond_t *const condition) {
+  (void)condition;
+  return 0;
+}
+
+static INLINE int pthread_cond_init(pthread_cond_t *const condition,
+                                    void *cond_attr) {
+  (void)cond_attr;
+  InitializeConditionVariable(condition);
+  return 0;
+}
+
+static INLINE int pthread_cond_signal(pthread_cond_t *const condition) {
+  WakeConditionVariable(condition);
+  return 0;
+}
+
+static INLINE int pthread_cond_broadcast(pthread_cond_t *const condition) {
+  WakeAllConditionVariable(condition);
+  return 0;
+}
+
+static INLINE int pthread_cond_wait(pthread_cond_t *const condition,
+                                    pthread_mutex_t *const mutex) {
+  int ok;
+  ok = SleepConditionVariableCS(condition, mutex, INFINITE);
+  return !ok;
+}
+#else                 // _WIN32
+#include <pthread.h>  // NOLINT
+#define THREADFN void *
+#define THREAD_EXIT_SUCCESS NULL
+#endif
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // CONFIG_MULTITHREAD
+
+#endif  // AOM_AOM_UTIL_AOM_PTHREAD_H_