From 6ad2f51e9e94daf6b5925590c4cc08459a2e0833 Mon Sep 17 00:00:00 2001
From: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Date: Mon, 4 Jul 2016 22:12:20 -0400
Subject: [PATCH 07/16] Add missing windows conditions variable
Those are used by generic RW lock implementation.
https://bugs.freedesktop.org/show_bug.cgi?id=96754
---
webrtc/system_wrappers/Makefile.am | 41 ++++-
.../include/condition_variable_wrapper.h | 42 +++++
.../system_wrappers/source/condition_variable.cc | 41 +++++
.../source/condition_variable_event_win.cc | 195 +++++++++++++++++++++
.../source/condition_variable_event_win.h | 46 +++++
.../source/condition_variable_native_win.cc | 104 +++++++++++
.../source/condition_variable_native_win.h | 54 ++++++
7 files changed, 514 insertions(+), 9 deletions(-)
create mode 100644 webrtc/system_wrappers/include/condition_variable_wrapper.h
create mode 100644 webrtc/system_wrappers/source/condition_variable.cc
create mode 100644 webrtc/system_wrappers/source/condition_variable_event_win.cc
create mode 100644 webrtc/system_wrappers/source/condition_variable_event_win.h
create mode 100644 webrtc/system_wrappers/source/condition_variable_native_win.cc
create mode 100644 webrtc/system_wrappers/source/condition_variable_native_win.h
diff --git a/webrtc/system_wrappers/Makefile.am b/webrtc/system_wrappers/Makefile.am
index 8215013..09973a7 100644
--- a/webrtc/system_wrappers/Makefile.am
+++ b/webrtc/system_wrappers/Makefile.am
@@ -2,6 +2,7 @@ noinst_LTLIBRARIES = libsystem_wrappers.la
noinst_HEADERS = include/aligned_array.h \
include/asm_defines.h \
+ include/condition_variable_wrapper.h \
include/compile_assert_c.h \
include/event_wrapper.h \
include/scoped_vector.h \
@@ -42,27 +43,49 @@ libsystem_wrappers_la_SOURCES = include/aligned_malloc.h \
source/trace_impl.h \
source/trace_posix.h \
source/trace_win.h
+
+EXTRA_DIST = BUILD.gn
+
if HAVE_POSIX
libsystem_wrappers_la_SOURCES += source/critical_section_posix.cc \
source/event_timer_posix.cc \
source/rw_lock_posix.cc \
source/thread_posix.cc \
source/trace_posix.cc
+else
+EXTRA_DIST += source/critical_section_posix.cc \
+ source/event_timer_posix.cc \
+ source/rw_lock_posix.cc \
+ source/thread_posix.cc \
+ source/trace_posix.cc
endif
+
if HAVE_WIN
-libsystem_wrappers_la_SOURCES += source/critical_section_win.cc \
+libsystem_wrappers_la_SOURCES += include/fix_interlocked_exchange_pointer_win.h \
+ source/critical_section_win.cc \
+ source/condition_variable.cc \
+ source/condition_variable_event_win.cc \
+ source/condition_variable_event_win.h \
+ source/condition_variable_native_win.cc \
+ source/condition_variable_native_win.h \
source/event_timer_win.cc \
source/rw_lock_win.cc \
source/rw_lock_generic.cc \
source/thread_win.cc \
source/trace_win.cc
+else
+EXTRA_DIST += include/fix_interlocked_exchange_pointer_win.h \
+ source/critical_section_win.cc \
+ source/condition_variable.cc \
+ source/condition_variable_event_win.cc \
+ source/condition_variable_event_win.h \
+ source/condition_variable_native_win.cc \
+ source/condition_variable_native_win.h \
+ source/event_timer_win.cc \
+ source/rw_lock_generic.cc \
+ source/rw_lock_win.cc \
+ source/thread_win.cc \
+ source/trace_win.cc
endif
-libsystem_wrappers_la_CXXFLAGS = $(AM_CXXFLAGS) $(COMMON_CXXFLAGS)
-EXTRA_DIST = BUILD.gn \
- source/critical_section_win.cc \
- source/event_timer_win.cc \
- source/rw_lock_generic.cc \
- source/rw_lock_win.cc \
- source/thread_win.cc \
- source/trace_win.cc
+libsystem_wrappers_la_CXXFLAGS = $(AM_CXXFLAGS) $(COMMON_CXXFLAGS)
diff --git a/webrtc/system_wrappers/include/condition_variable_wrapper.h b/webrtc/system_wrappers/include/condition_variable_wrapper.h
new file mode 100644
index 0000000..37ca30f
--- /dev/null
+++ b/webrtc/system_wrappers/include/condition_variable_wrapper.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_SYSTEM_WRAPPERS_INCLUDE_CONDITION_VARIABLE_WRAPPER_H_
+#define WEBRTC_SYSTEM_WRAPPERS_INCLUDE_CONDITION_VARIABLE_WRAPPER_H_
+
+namespace webrtc {
+
+class CriticalSectionWrapper;
+
+class ConditionVariableWrapper {
+ public:
+ // Factory method, constructor disabled.
+ static ConditionVariableWrapper* CreateConditionVariable();
+
+ virtual ~ConditionVariableWrapper() {}
+
+ // Calling thread will atomically release crit_sect and wait until next
+ // some other thread calls Wake() or WakeAll().
+ virtual void SleepCS(CriticalSectionWrapper& crit_sect) = 0;
+
+ // Same as above but with a timeout.
+ virtual bool SleepCS(CriticalSectionWrapper& crit_sect,
+ unsigned long max_time_in_ms) = 0;
+
+ // Wakes one thread calling SleepCS().
+ virtual void Wake() = 0;
+
+ // Wakes all threads calling SleepCS().
+ virtual void WakeAll() = 0;
+};
+
+} // namespace webrtc
+
+#endif // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_CONDITION_VARIABLE_WRAPPER_H_
diff --git a/webrtc/system_wrappers/source/condition_variable.cc b/webrtc/system_wrappers/source/condition_variable.cc
new file mode 100644
index 0000000..f5ae93a
--- /dev/null
+++ b/webrtc/system_wrappers/source/condition_variable.cc
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/system_wrappers/include/condition_variable_wrapper.h"
+
+#if defined(_WIN32)
+#include <windows.h>
+#include "webrtc/system_wrappers/source/condition_variable_event_win.h"
+#include "webrtc/system_wrappers/source/condition_variable_native_win.h"
+#elif defined(WEBRTC_LINUX) || defined(WEBRTC_MAC)
+#include <pthread.h>
+#include "webrtc/system_wrappers/source/condition_variable_posix.h"
+#endif
+
+namespace webrtc {
+
+ConditionVariableWrapper* ConditionVariableWrapper::CreateConditionVariable() {
+#if defined(_WIN32)
+ // Try to create native condition variable implementation.
+ ConditionVariableWrapper* ret_val = ConditionVariableNativeWin::Create();
+ if (!ret_val) {
+ // Native condition variable implementation does not exist. Create generic
+ // condition variable based on events.
+ ret_val = new ConditionVariableEventWin();
+ }
+ return ret_val;
+#elif defined(WEBRTC_LINUX) || defined(WEBRTC_MAC)
+ return ConditionVariablePosix::Create();
+#else
+ return NULL;
+#endif
+}
+
+} // namespace webrtc
diff --git a/webrtc/system_wrappers/source/condition_variable_event_win.cc b/webrtc/system_wrappers/source/condition_variable_event_win.cc
new file mode 100644
index 0000000..41b019d
--- /dev/null
+++ b/webrtc/system_wrappers/source/condition_variable_event_win.cc
@@ -0,0 +1,195 @@
+/*
+Source:
+http://www1.cse.wustl.edu/~schmidt/ACE-copying.html
+
+License:
+Copyright and Licensing Information for ACE(TM), TAO(TM), CIAO(TM), DAnCE(TM),
+and CoSMIC(TM)
+
+ACE(TM), TAO(TM), CIAO(TM), DAnCE>(TM), and CoSMIC(TM) (henceforth referred to
+as "DOC software") are copyrighted by Douglas C. Schmidt and his research
+group at Washington University, University of California, Irvine, and
+Vanderbilt University, Copyright (c) 1993-2009, all rights reserved. Since DOC
+software is open-source, freely available software, you are free to use,
+modify, copy, and distribute--perpetually and irrevocably--the DOC software
+source code and object code produced from the source, as well as copy and
+distribute modified versions of this software. You must, however, include this
+copyright statement along with any code built using DOC software that you
+release. No copyright statement needs to be provided if you just ship binary
+executables of your software products.
+You can use DOC software in commercial and/or binary software releases and are
+under no obligation to redistribute any of your source code that is built
+using DOC software. Note, however, that you may not misappropriate the DOC
+software code, such as copyrighting it yourself or claiming authorship of the
+DOC software code, in a way that will prevent DOC software from being
+distributed freely using an open-source development model. You needn't inform
+anyone that you're using DOC software in your software, though we encourage
+you to let us know so we can promote your project in the DOC software success
+stories.
+
+The ACE, TAO, CIAO, DAnCE, and CoSMIC web sites are maintained by the DOC
+Group at the Institute for Software Integrated Systems (ISIS) and the Center
+for Distributed Object Computing of Washington University, St. Louis for the
+development of open-source software as part of the open-source software
+community. Submissions are provided by the submitter ``as is'' with no
+warranties whatsoever, including any warranty of merchantability,
+noninfringement of third party intellectual property, or fitness for any
+particular purpose. In no event shall the submitter be liable for any direct,
+indirect, special, exemplary, punitive, or consequential damages, including
+without limitation, lost profits, even if advised of the possibility of such
+damages. Likewise, DOC software is provided as is with no warranties of any
+kind, including the warranties of design, merchantability, and fitness for a
+particular purpose, noninfringement, or arising from a course of dealing,
+usage or trade practice. Washington University, UC Irvine, Vanderbilt
+University, their employees, and students shall have no liability with respect
+to the infringement of copyrights, trade secrets or any patents by DOC
+software or any part thereof. Moreover, in no event will Washington
+University, UC Irvine, or Vanderbilt University, their employees, or students
+be liable for any lost revenue or profits or other special, indirect and
+consequential damages.
+
+DOC software is provided with no support and without any obligation on the
+part of Washington University, UC Irvine, Vanderbilt University, their
+employees, or students to assist in its use, correction, modification, or
+enhancement. A number of companies around the world provide commercial support
+for DOC software, however. DOC software is Y2K-compliant, as long as the
+underlying OS platform is Y2K-compliant. Likewise, DOC software is compliant
+with the new US daylight savings rule passed by Congress as "The Energy Policy
+Act of 2005," which established new daylight savings times (DST) rules for the
+United States that expand DST as of March 2007. Since DOC software obtains
+time/date and calendaring information from operating systems users will not be
+affected by the new DST rules as long as they upgrade their operating systems
+accordingly.
+
+The names ACE(TM), TAO(TM), CIAO(TM), DAnCE(TM), CoSMIC(TM), Washington
+University, UC Irvine, and Vanderbilt University, may not be used to endorse
+or promote products or services derived from this source without express
+written permission from Washington University, UC Irvine, or Vanderbilt
+University. This license grants no permission to call products or services
+derived from this source ACE(TM), TAO(TM), CIAO(TM), DAnCE(TM), or CoSMIC(TM),
+nor does it grant permission for the name Washington University, UC Irvine, or
+Vanderbilt University to appear in their names.
+*/
+
+/*
+ * This source code contain modifications to the original source code
+ * which can be found here:
+ * http://www.cs.wustl.edu/~schmidt/win32-cv-1.html (section 3.2).
+ * Modifications:
+ * 1) Dynamic detection of native support for condition variables.
+ * 2) Use of WebRTC defined types and classes. Renaming of some functions.
+ * 3) Introduction of a second event for wake all functionality. This prevents
+ * a thread from spinning on the same condition variable, preventing other
+ * threads from waking up.
+ */
+
+#include "webrtc/system_wrappers/source/condition_variable_event_win.h"
+#include "webrtc/system_wrappers/source/critical_section_win.h"
+
+namespace webrtc {
+
+ConditionVariableEventWin::ConditionVariableEventWin() : eventID_(WAKEALL_0) {
+ memset(&num_waiters_[0], 0, sizeof(num_waiters_));
+
+ InitializeCriticalSection(&num_waiters_crit_sect_);
+
+ events_[WAKEALL_0] = CreateEvent(NULL, // no security attributes
+ TRUE, // manual-reset, sticky event
+ FALSE, // initial state non-signaled
+ NULL); // no name for event
+
+ events_[WAKEALL_1] = CreateEvent(NULL, // no security attributes
+ TRUE, // manual-reset, sticky event
+ FALSE, // initial state non-signaled
+ NULL); // no name for event
+
+ events_[WAKE] = CreateEvent(NULL, // no security attributes
+ FALSE, // auto-reset, sticky event
+ FALSE, // initial state non-signaled
+ NULL); // no name for event
+}
+
+ConditionVariableEventWin::~ConditionVariableEventWin() {
+ CloseHandle(events_[WAKE]);
+ CloseHandle(events_[WAKEALL_1]);
+ CloseHandle(events_[WAKEALL_0]);
+
+ DeleteCriticalSection(&num_waiters_crit_sect_);
+}
+
+void ConditionVariableEventWin::SleepCS(CriticalSectionWrapper& crit_sect) {
+ SleepCS(crit_sect, INFINITE);
+}
+
+bool ConditionVariableEventWin::SleepCS(CriticalSectionWrapper& crit_sect,
+ unsigned long max_time_in_ms) {
+ EnterCriticalSection(&num_waiters_crit_sect_);
+
+ // Get the eventID for the event that will be triggered by next
+ // WakeAll() call and start waiting for it.
+ const EventWakeUpType eventID =
+ (WAKEALL_0 == eventID_) ? WAKEALL_1 : WAKEALL_0;
+
+ ++(num_waiters_[eventID]);
+ LeaveCriticalSection(&num_waiters_crit_sect_);
+
+ CriticalSectionWindows* cs =
+ static_cast<CriticalSectionWindows*>(&crit_sect);
+ LeaveCriticalSection(&cs->crit);
+ HANDLE events[2];
+ events[0] = events_[WAKE];
+ events[1] = events_[eventID];
+ const DWORD result = WaitForMultipleObjects(2, // Wait on 2 events.
+ events,
+ FALSE, // Wait for either.
+ max_time_in_ms);
+
+ const bool ret_val = (result != WAIT_TIMEOUT);
+
+ EnterCriticalSection(&num_waiters_crit_sect_);
+ --(num_waiters_[eventID]);
+
+ // Last waiter should only be true for WakeAll(). WakeAll() correspond
+ // to position 1 in events[] -> (result == WAIT_OBJECT_0 + 1)
+ const bool last_waiter = (result == WAIT_OBJECT_0 + 1) &&
+ (num_waiters_[eventID] == 0);
+ LeaveCriticalSection(&num_waiters_crit_sect_);
+
+ if (last_waiter) {
+ // Reset/unset the WakeAll() event since all threads have been
+ // released.
+ ResetEvent(events_[eventID]);
+ }
+
+ EnterCriticalSection(&cs->crit);
+ return ret_val;
+}
+
+void ConditionVariableEventWin::Wake() {
+ EnterCriticalSection(&num_waiters_crit_sect_);
+ const bool have_waiters = (num_waiters_[WAKEALL_0] > 0) ||
+ (num_waiters_[WAKEALL_1] > 0);
+ LeaveCriticalSection(&num_waiters_crit_sect_);
+
+ if (have_waiters) {
+ SetEvent(events_[WAKE]);
+ }
+}
+
+void ConditionVariableEventWin::WakeAll() {
+ EnterCriticalSection(&num_waiters_crit_sect_);
+
+ // Update current WakeAll() event
+ eventID_ = (WAKEALL_0 == eventID_) ? WAKEALL_1 : WAKEALL_0;
+
+ // Trigger current event
+ const EventWakeUpType eventID = eventID_;
+ const bool have_waiters = num_waiters_[eventID] > 0;
+ LeaveCriticalSection(&num_waiters_crit_sect_);
+
+ if (have_waiters) {
+ SetEvent(events_[eventID]);
+ }
+}
+
+} // namespace webrtc
diff --git a/webrtc/system_wrappers/source/condition_variable_event_win.h b/webrtc/system_wrappers/source/condition_variable_event_win.h
new file mode 100644
index 0000000..cdcef7d
--- /dev/null
+++ b/webrtc/system_wrappers/source/condition_variable_event_win.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_SYSTEM_WRAPPERS_SOURCE_CONDITION_VARIABLE_EVENT_WIN_H_
+#define WEBRTC_SYSTEM_WRAPPERS_SOURCE_CONDITION_VARIABLE_EVENT_WIN_H_
+
+#include <windows.h>
+
+#include "webrtc/system_wrappers/include/condition_variable_wrapper.h"
+
+namespace webrtc {
+
+class ConditionVariableEventWin : public ConditionVariableWrapper {
+ public:
+ ConditionVariableEventWin();
+ virtual ~ConditionVariableEventWin();
+
+ void SleepCS(CriticalSectionWrapper& crit_sect);
+ bool SleepCS(CriticalSectionWrapper& crit_sect, unsigned long max_time_inMS);
+ void Wake();
+ void WakeAll();
+
+ private:
+ enum EventWakeUpType {
+ WAKEALL_0 = 0,
+ WAKEALL_1 = 1,
+ WAKE = 2,
+ EVENT_COUNT = 3
+ };
+
+ unsigned int num_waiters_[2];
+ EventWakeUpType eventID_;
+ CRITICAL_SECTION num_waiters_crit_sect_;
+ HANDLE events_[EVENT_COUNT];
+};
+
+} // namespace webrtc
+
+#endif // WEBRTC_SYSTEM_WRAPPERS_SOURCE_CONDITION_VARIABLE_EVENT_WIN_H_
diff --git a/webrtc/system_wrappers/source/condition_variable_native_win.cc b/webrtc/system_wrappers/source/condition_variable_native_win.cc
new file mode 100644
index 0000000..45225f2
--- /dev/null
+++ b/webrtc/system_wrappers/source/condition_variable_native_win.cc
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/system_wrappers/include/trace.h"
+#include "webrtc/system_wrappers/source/condition_variable_native_win.h"
+#include "webrtc/system_wrappers/source/critical_section_win.h"
+
+namespace webrtc {
+
+static HMODULE library = NULL;
+static bool win_support_condition_variables_primitive = false;
+
+PInitializeConditionVariable PInitializeConditionVariable_;
+PSleepConditionVariableCS PSleepConditionVariableCS_;
+PWakeConditionVariable PWakeConditionVariable_;
+PWakeAllConditionVariable PWakeAllConditionVariable_;
+
+typedef void (WINAPI *PInitializeConditionVariable)(PCONDITION_VARIABLE);
+typedef BOOL (WINAPI *PSleepConditionVariableCS)(PCONDITION_VARIABLE,
+ PCRITICAL_SECTION, DWORD);
+typedef void (WINAPI *PWakeConditionVariable)(PCONDITION_VARIABLE);
+typedef void (WINAPI *PWakeAllConditionVariable)(PCONDITION_VARIABLE);
+
+ConditionVariableNativeWin::ConditionVariableNativeWin() {
+}
+
+ConditionVariableNativeWin::~ConditionVariableNativeWin() {
+}
+
+ConditionVariableWrapper* ConditionVariableNativeWin::Create() {
+ ConditionVariableNativeWin* ret_val = new ConditionVariableNativeWin();
+ if (!ret_val->Init()) {
+ delete ret_val;
+ return NULL;
+ }
+ return ret_val;
+}
+
+bool ConditionVariableNativeWin::Init() {
+ if (!library) {
+ // Native implementation is supported on Vista+.
+ library = LoadLibrary(TEXT("Kernel32.dll"));
+ // TODO(henrike): this code results in an attempt to load the above dll
+ // every time the previous attempt failed. Only try to load once.
+ if (library) {
+ // TODO(henrike): not thread safe as reading and writing to library is not
+ // serialized. Fix.
+ WEBRTC_TRACE(kTraceStateInfo, kTraceUtility, -1, "Loaded Kernel.dll");
+
+ PInitializeConditionVariable_ =
+ (PInitializeConditionVariable) GetProcAddress(
+ library, "InitializeConditionVariable");
+ PSleepConditionVariableCS_ = (PSleepConditionVariableCS) GetProcAddress(
+ library, "SleepConditionVariableCS");
+ PWakeConditionVariable_ = (PWakeConditionVariable) GetProcAddress(
+ library, "WakeConditionVariable");
+ PWakeAllConditionVariable_ = (PWakeAllConditionVariable) GetProcAddress(
+ library, "WakeAllConditionVariable");
+
+ if (PInitializeConditionVariable_ && PSleepConditionVariableCS_
+ && PWakeConditionVariable_ && PWakeAllConditionVariable_) {
+ WEBRTC_TRACE(
+ kTraceStateInfo, kTraceUtility, -1,
+ "Loaded native condition variables");
+ win_support_condition_variables_primitive = true;
+ }
+ }
+ }
+ if (!win_support_condition_variables_primitive) {
+ return false;
+ }
+ PInitializeConditionVariable_(&condition_variable_);
+ return true;
+}
+
+void ConditionVariableNativeWin::SleepCS(CriticalSectionWrapper& crit_sect) {
+ SleepCS(crit_sect, INFINITE);
+}
+
+bool ConditionVariableNativeWin::SleepCS(CriticalSectionWrapper& crit_sect,
+ unsigned long max_time_in_ms) {
+ CriticalSectionWindows* cs =
+ static_cast<CriticalSectionWindows*>(&crit_sect);
+ BOOL ret_val = PSleepConditionVariableCS_(&condition_variable_,
+ &(cs->crit), max_time_in_ms);
+ return ret_val != 0;
+}
+
+void ConditionVariableNativeWin::Wake() {
+ PWakeConditionVariable_(&condition_variable_);
+}
+
+void ConditionVariableNativeWin::WakeAll() {
+ PWakeAllConditionVariable_(&condition_variable_);
+}
+
+} // namespace webrtc
diff --git a/webrtc/system_wrappers/source/condition_variable_native_win.h b/webrtc/system_wrappers/source/condition_variable_native_win.h
new file mode 100644
index 0000000..c22787f
--- /dev/null
+++ b/webrtc/system_wrappers/source/condition_variable_native_win.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_SYSTEM_WRAPPERS_SOURCE_CONDITION_VARIABLE_NATIVE_WIN_H_
+#define WEBRTC_SYSTEM_WRAPPERS_SOURCE_CONDITION_VARIABLE_NATIVE_WIN_H_
+
+#include <windows.h>
+
+#include "webrtc/system_wrappers/include/condition_variable_wrapper.h"
+
+namespace webrtc {
+
+#if !defined CONDITION_VARIABLE_INIT
+typedef struct RTL_CONDITION_VARIABLE_ {
+ void* Ptr;
+} RTL_CONDITION_VARIABLE, *PRTL_CONDITION_VARIABLE;
+
+typedef RTL_CONDITION_VARIABLE CONDITION_VARIABLE, *PCONDITION_VARIABLE;
+#endif
+
+typedef void (WINAPI* PInitializeConditionVariable)(PCONDITION_VARIABLE);
+typedef BOOL (WINAPI* PSleepConditionVariableCS)(PCONDITION_VARIABLE,
+ PCRITICAL_SECTION, DWORD);
+typedef void (WINAPI* PWakeConditionVariable)(PCONDITION_VARIABLE);
+typedef void (WINAPI* PWakeAllConditionVariable)(PCONDITION_VARIABLE);
+
+class ConditionVariableNativeWin : public ConditionVariableWrapper {
+ public:
+ static ConditionVariableWrapper* Create();
+ virtual ~ConditionVariableNativeWin();
+
+ void SleepCS(CriticalSectionWrapper& crit_sect);
+ bool SleepCS(CriticalSectionWrapper& crit_sect, unsigned long max_time_inMS);
+ void Wake();
+ void WakeAll();
+
+ private:
+ ConditionVariableNativeWin();
+
+ bool Init();
+
+ CONDITION_VARIABLE condition_variable_;
+};
+
+} // namespace webrtc
+
+#endif // WEBRTC_SYSTEM_WRAPPERS_SOURCE_CONDITION_VARIABLE_NATIVE_WIN_H_
--
2.14.3