WinRT: added a skeleton SDL backend for C++11-based threads
authorDavid Ludwig <dludwig@pobox.com>
Thu, 22 Nov 2012 23:03:56 -0500
changeset 8356 4d85eba58f0a
parent 8355 f73480bf3e55
child 8357 8d788bb003f2
WinRT: added a skeleton SDL backend for C++11-based threads
VisualC/SDL/SDL_VS2012_WinRT.vcxproj
VisualC/tests/testthread/WinRT/Assets/Logo.png
VisualC/tests/testthread/WinRT/Assets/SmallLogo.png
VisualC/tests/testthread/WinRT/Assets/SplashScreen.png
VisualC/tests/testthread/WinRT/Assets/StoreLogo.png
VisualC/tests/testthread/WinRT/Package.appxmanifest
VisualC/tests/testthread/WinRT/testthread_VS2012_WinRT.vcxproj
VisualC/tests/testthread/WinRT/testthread_VS2012_WinRT_TemporaryKey.pfx
include/SDL_config_windowsrt.h
src/thread/SDL_thread_c.h
src/thread/stdcpp/SDL_syscond.c
src/thread/stdcpp/SDL_sysmutex.c
src/thread/stdcpp/SDL_sysmutex_c.h
src/thread/stdcpp/SDL_systhread.c
src/thread/stdcpp/SDL_systhread_c.h
--- a/VisualC/SDL/SDL_VS2012_WinRT.vcxproj	Thu Nov 22 22:36:34 2012 -0500
+++ b/VisualC/SDL/SDL_VS2012_WinRT.vcxproj	Thu Nov 22 23:03:56 2012 -0500
@@ -89,11 +89,11 @@
     <ClCompile Include="..\..\src\stdlib\SDL_qsort.c" />
     <ClCompile Include="..\..\src\stdlib\SDL_stdlib.c" />
     <ClCompile Include="..\..\src\stdlib\SDL_string.c" />
-    <ClCompile Include="..\..\src\thread\generic\SDL_syscond.c" />
-    <ClCompile Include="..\..\src\thread\generic\SDL_sysmutex.c" />
     <ClCompile Include="..\..\src\thread\generic\SDL_syssem.c" />
-    <ClCompile Include="..\..\src\thread\generic\SDL_systhread.c" />
     <ClCompile Include="..\..\src\thread\SDL_thread.c" />
+    <ClCompile Include="..\..\src\thread\stdcpp\SDL_syscond.c" />
+    <ClCompile Include="..\..\src\thread\stdcpp\SDL_sysmutex.c" />
+    <ClCompile Include="..\..\src\thread\stdcpp\SDL_systhread.c" />
     <ClCompile Include="..\..\src\timer\dummy\SDL_systimer.c" />
     <ClCompile Include="..\..\src\timer\SDL_timer.c" />
     <ClCompile Include="..\..\src\video\dummy\SDL_nullevents.c" />
@@ -253,10 +253,10 @@
     <ClInclude Include="..\..\src\SDL_error_c.h" />
     <ClInclude Include="..\..\src\SDL_fatal.h" />
     <ClInclude Include="..\..\src\SDL_hints_c.h" />
-    <ClInclude Include="..\..\src\thread\generic\SDL_sysmutex_c.h" />
-    <ClInclude Include="..\..\src\thread\generic\SDL_systhread_c.h" />
     <ClInclude Include="..\..\src\thread\SDL_systhread.h" />
     <ClInclude Include="..\..\src\thread\SDL_thread_c.h" />
+    <ClInclude Include="..\..\src\thread\stdcpp\SDL_sysmutex_c.h" />
+    <ClInclude Include="..\..\src\thread\stdcpp\SDL_systhread_c.h" />
     <ClInclude Include="..\..\src\timer\SDL_timer_c.h" />
     <ClInclude Include="..\..\src\video\dummy\SDL_nullevents_c.h" />
     <ClInclude Include="..\..\src\video\dummy\SDL_nullframebuffer_c.h" />
Binary file VisualC/tests/testthread/WinRT/Assets/Logo.png has changed
Binary file VisualC/tests/testthread/WinRT/Assets/SmallLogo.png has changed
Binary file VisualC/tests/testthread/WinRT/Assets/SplashScreen.png has changed
Binary file VisualC/tests/testthread/WinRT/Assets/StoreLogo.png has changed
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/VisualC/tests/testthread/WinRT/Package.appxmanifest	Thu Nov 22 23:03:56 2012 -0500
@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Package xmlns="http://schemas.microsoft.com/appx/2010/manifest">
+
+  <Identity Name="ca3178f1-b2b2-43bf-97dd-28ee1b7d32c5"
+            Publisher="CN=David"
+            Version="1.0.0.0" />
+
+  <Properties>
+    <DisplayName>testthread_VS2012_WinRT</DisplayName>
+    <PublisherDisplayName>David</PublisherDisplayName>
+    <Logo>Assets\StoreLogo.png</Logo>
+  </Properties>
+
+  <Prerequisites>
+    <OSMinVersion>6.2.1</OSMinVersion>
+    <OSMaxVersionTested>6.2.1</OSMaxVersionTested>
+  </Prerequisites>
+
+  <Resources>
+    <Resource Language="x-generate"/>
+  </Resources>
+
+  <Applications>
+    <Application Id="App"
+        Executable="$targetnametoken$.exe"
+        EntryPoint="testthread_VS2012_WinRT.App">
+        <VisualElements
+            DisplayName="testthread_VS2012_WinRT"
+            Logo="Assets\Logo.png"
+            SmallLogo="Assets\SmallLogo.png"
+            Description="testthread_VS2012_WinRT"
+            ForegroundText="light"
+            BackgroundColor="#464646">
+            <DefaultTile ShowName="allLogos" />
+            <SplashScreen Image="Assets\SplashScreen.png" />
+        </VisualElements>
+    </Application>
+  </Applications>
+  <Capabilities>
+    <Capability Name="internetClient" />
+  </Capabilities>
+</Package>
\ No newline at end of file
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/VisualC/tests/testthread/WinRT/testthread_VS2012_WinRT.vcxproj	Thu Nov 22 23:03:56 2012 -0500
@@ -0,0 +1,159 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|ARM">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM">
+      <Configuration>Release</Configuration>
+      <Platform>ARM</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{a8705bee-d01d-46a4-b2ab-feedfb5fdd11}</ProjectGuid>
+    <RootNamespace>testthread_VS2012_WinRT</RootNamespace>
+    <DefaultLanguage>en-US</DefaultLanguage>
+    <MinimumVisualStudioVersion>11.0</MinimumVisualStudioVersion>
+    <AppContainerApplication>true</AppContainerApplication>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v110</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v110</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v110</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <PlatformToolset>v110</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <PlatformToolset>v110</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <PlatformToolset>v110</PlatformToolset>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|ARM'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup>
+    <PackageCertificateKeyFile>testthread_VS2012_WinRT_TemporaryKey.pfx</PackageCertificateKeyFile>
+  </PropertyGroup>
+  <ItemDefinitionGroup>
+    <Link>
+      <AdditionalDependencies>d2d1.lib; d3d11.lib; dxgi.lib; ole32.lib; windowscodecs.lib; dwrite.lib; %(AdditionalDependencies)</AdditionalDependencies>
+    </Link>
+    <ClCompile>
+      <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
+      <PrecompiledHeaderOutputFile>$(IntDir)pch.pch</PrecompiledHeaderOutputFile>
+      <AdditionalIncludeDirectories>$(ProjectDir);$(IntermediateOutputPath);$(ProjectDir)..\..\..\..\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <DisableSpecificWarnings>4453</DisableSpecificWarnings>
+    </ClCompile>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)'=='Release'">
+    <ClCompile>
+      <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|ARM'">NotUsing</PrecompiledHeader>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">NotUsing</PrecompiledHeader>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|x64'">NotUsing</PrecompiledHeader>
+      <CompileAsWinRT Condition="'$(Configuration)|$(Platform)'=='Release|ARM'">false</CompileAsWinRT>
+      <CompileAsWinRT Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">false</CompileAsWinRT>
+      <CompileAsWinRT Condition="'$(Configuration)|$(Platform)'=='Release|x64'">false</CompileAsWinRT>
+    </ClCompile>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)'=='Debug'">
+    <ClCompile>
+      <PreprocessorDefinitions>_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'">NotUsing</PrecompiledHeader>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">NotUsing</PrecompiledHeader>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">NotUsing</PrecompiledHeader>
+      <CompileAsWinRT Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'">false</CompileAsWinRT>
+      <CompileAsWinRT Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">false</CompileAsWinRT>
+      <CompileAsWinRT Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">false</CompileAsWinRT>
+    </ClCompile>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <Image Include="Assets\Logo.png" />
+    <Image Include="Assets\SmallLogo.png" />
+    <Image Include="Assets\StoreLogo.png" />
+    <Image Include="Assets\SplashScreen.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <AppxManifest Include="Package.appxmanifest">
+      <SubType>Designer</SubType>
+    </AppxManifest>
+    <None Include="testthread_VS2012_WinRT_TemporaryKey.pfx" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="..\..\..\..\src\main\windowsrt\SDL_winrt_main.cpp">
+      <CompileAsWinRT Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'">true</CompileAsWinRT>
+      <CompileAsWinRT Condition="'$(Configuration)|$(Platform)'=='Release|ARM'">true</CompileAsWinRT>
+      <CompileAsWinRT Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</CompileAsWinRT>
+      <CompileAsWinRT Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</CompileAsWinRT>
+      <CompileAsWinRT Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">true</CompileAsWinRT>
+      <CompileAsWinRT Condition="'$(Configuration)|$(Platform)'=='Release|x64'">true</CompileAsWinRT>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\test\testthread.c" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\..\..\SDL\SDL_VS2012_WinRT.vcxproj">
+      <Project>{aeaea3a2-d4e6-45b1-8ec6-53d84287fc14}</Project>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
\ No newline at end of file
Binary file VisualC/tests/testthread/WinRT/testthread_VS2012_WinRT_TemporaryKey.pfx has changed
--- a/include/SDL_config_windowsrt.h	Thu Nov 22 22:36:34 2012 -0500
+++ b/include/SDL_config_windowsrt.h	Thu Nov 22 23:03:56 2012 -0500
@@ -158,9 +158,9 @@
 #define SDL_LOADSO_WINDOWS	1
 
 /* Enable various threading systems */
-// TODO, WinRT: get threads working on WinRT
-#define SDL_THREADS_DISABLED    1
+//#define SDL_THREADS_DISABLED    1
 //#define SDL_THREAD_WINDOWS	1
+#define SDL_THREAD_STDCPP   1
 
 /* Enable various timer systems */
 // TODO, WinRT: look into getting SDL's pre-WinRT timers working.
--- a/src/thread/SDL_thread_c.h	Thu Nov 22 22:36:34 2012 -0500
+++ b/src/thread/SDL_thread_c.h	Thu Nov 22 23:03:56 2012 -0500
@@ -36,6 +36,8 @@
 #include "windows/SDL_systhread_c.h"
 #elif SDL_THREAD_NDS
 #include "nds/SDL_systhread_c.h"
+#elif SDL_THREAD_STDCPP
+#include "stdcpp/SDL_systhread_c.h"
 #else
 #error Need thread implementation for this platform
 #include "generic/SDL_systhread_c.h"
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/thread/stdcpp/SDL_syscond.c	Thu Nov 22 23:03:56 2012 -0500
@@ -0,0 +1,223 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_config.h"
+
+/* An implementation of condition variables using semaphores and mutexes */
+/*
+   This implementation borrows heavily from the BeOS condition variable
+   implementation, written by Christopher Tate and Owen Smith.  Thanks!
+ */
+
+#include "SDL_thread.h"
+
+struct SDL_cond
+{
+    SDL_mutex *lock;
+    int waiting;
+    int signals;
+    SDL_sem *wait_sem;
+    SDL_sem *wait_done;
+};
+
+/* Create a condition variable */
+SDL_cond *
+SDL_CreateCond(void)
+{
+    SDL_cond *cond;
+
+    cond = (SDL_cond *) SDL_malloc(sizeof(SDL_cond));
+    if (cond) {
+        cond->lock = SDL_CreateMutex();
+        cond->wait_sem = SDL_CreateSemaphore(0);
+        cond->wait_done = SDL_CreateSemaphore(0);
+        cond->waiting = cond->signals = 0;
+        if (!cond->lock || !cond->wait_sem || !cond->wait_done) {
+            SDL_DestroyCond(cond);
+            cond = NULL;
+        }
+    } else {
+        SDL_OutOfMemory();
+    }
+    return (cond);
+}
+
+/* Destroy a condition variable */
+void
+SDL_DestroyCond(SDL_cond * cond)
+{
+    if (cond) {
+        if (cond->wait_sem) {
+            SDL_DestroySemaphore(cond->wait_sem);
+        }
+        if (cond->wait_done) {
+            SDL_DestroySemaphore(cond->wait_done);
+        }
+        if (cond->lock) {
+            SDL_DestroyMutex(cond->lock);
+        }
+        SDL_free(cond);
+    }
+}
+
+/* Restart one of the threads that are waiting on the condition variable */
+int
+SDL_CondSignal(SDL_cond * cond)
+{
+    if (!cond) {
+        SDL_SetError("Passed a NULL condition variable");
+        return -1;
+    }
+
+    /* If there are waiting threads not already signalled, then
+       signal the condition and wait for the thread to respond.
+     */
+    SDL_LockMutex(cond->lock);
+    if (cond->waiting > cond->signals) {
+        ++cond->signals;
+        SDL_SemPost(cond->wait_sem);
+        SDL_UnlockMutex(cond->lock);
+        SDL_SemWait(cond->wait_done);
+    } else {
+        SDL_UnlockMutex(cond->lock);
+    }
+
+    return 0;
+}
+
+/* Restart all threads that are waiting on the condition variable */
+int
+SDL_CondBroadcast(SDL_cond * cond)
+{
+    if (!cond) {
+        SDL_SetError("Passed a NULL condition variable");
+        return -1;
+    }
+
+    /* If there are waiting threads not already signalled, then
+       signal the condition and wait for the thread to respond.
+     */
+    SDL_LockMutex(cond->lock);
+    if (cond->waiting > cond->signals) {
+        int i, num_waiting;
+
+        num_waiting = (cond->waiting - cond->signals);
+        cond->signals = cond->waiting;
+        for (i = 0; i < num_waiting; ++i) {
+            SDL_SemPost(cond->wait_sem);
+        }
+        /* Now all released threads are blocked here, waiting for us.
+           Collect them all (and win fabulous prizes!) :-)
+         */
+        SDL_UnlockMutex(cond->lock);
+        for (i = 0; i < num_waiting; ++i) {
+            SDL_SemWait(cond->wait_done);
+        }
+    } else {
+        SDL_UnlockMutex(cond->lock);
+    }
+
+    return 0;
+}
+
+/* Wait on the condition variable for at most 'ms' milliseconds.
+   The mutex must be locked before entering this function!
+   The mutex is unlocked during the wait, and locked again after the wait.
+
+Typical use:
+
+Thread A:
+    SDL_LockMutex(lock);
+    while ( ! condition ) {
+        SDL_CondWait(cond, lock);
+    }
+    SDL_UnlockMutex(lock);
+
+Thread B:
+    SDL_LockMutex(lock);
+    ...
+    condition = true;
+    ...
+    SDL_CondSignal(cond);
+    SDL_UnlockMutex(lock);
+ */
+int
+SDL_CondWaitTimeout(SDL_cond * cond, SDL_mutex * mutex, Uint32 ms)
+{
+    int retval;
+
+    if (!cond) {
+        SDL_SetError("Passed a NULL condition variable");
+        return -1;
+    }
+
+    /* Obtain the protection mutex, and increment the number of waiters.
+       This allows the signal mechanism to only perform a signal if there
+       are waiting threads.
+     */
+    SDL_LockMutex(cond->lock);
+    ++cond->waiting;
+    SDL_UnlockMutex(cond->lock);
+
+    /* Unlock the mutex, as is required by condition variable semantics */
+    SDL_UnlockMutex(mutex);
+
+    /* Wait for a signal */
+    if (ms == SDL_MUTEX_MAXWAIT) {
+        retval = SDL_SemWait(cond->wait_sem);
+    } else {
+        retval = SDL_SemWaitTimeout(cond->wait_sem, ms);
+    }
+
+    /* Let the signaler know we have completed the wait, otherwise
+       the signaler can race ahead and get the condition semaphore
+       if we are stopped between the mutex unlock and semaphore wait,
+       giving a deadlock.  See the following URL for details:
+       http://www-classic.be.com/aboutbe/benewsletter/volume_III/Issue40.html
+     */
+    SDL_LockMutex(cond->lock);
+    if (cond->signals > 0) {
+        /* If we timed out, we need to eat a condition signal */
+        if (retval > 0) {
+            SDL_SemWait(cond->wait_sem);
+        }
+        /* We always notify the signal thread that we are done */
+        SDL_SemPost(cond->wait_done);
+
+        /* Signal handshake complete */
+        --cond->signals;
+    }
+    --cond->waiting;
+    SDL_UnlockMutex(cond->lock);
+
+    /* Lock the mutex, as is required by condition variable semantics */
+    SDL_LockMutex(mutex);
+
+    return retval;
+}
+
+/* Wait on the condition variable forever */
+int
+SDL_CondWait(SDL_cond * cond, SDL_mutex * mutex)
+{
+    return SDL_CondWaitTimeout(cond, mutex, SDL_MUTEX_MAXWAIT);
+}
+
+/* vi: set ts=4 sw=4 expandtab: */
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/thread/stdcpp/SDL_sysmutex.c	Thu Nov 22 23:03:56 2012 -0500
@@ -0,0 +1,135 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_config.h"
+
+/* An implementation of mutexes using semaphores */
+
+#include "SDL_thread.h"
+#include "SDL_systhread_c.h"
+
+
+struct SDL_mutex
+{
+    int recursive;
+    SDL_threadID owner;
+    SDL_sem *sem;
+};
+
+/* Create a mutex */
+SDL_mutex *
+SDL_CreateMutex(void)
+{
+    SDL_mutex *mutex;
+
+    /* Allocate mutex memory */
+    mutex = (SDL_mutex *) SDL_malloc(sizeof(*mutex));
+    if (mutex) {
+        /* Create the mutex semaphore, with initial value 1 */
+        mutex->sem = SDL_CreateSemaphore(1);
+        mutex->recursive = 0;
+        mutex->owner = 0;
+        if (!mutex->sem) {
+            SDL_free(mutex);
+            mutex = NULL;
+        }
+    } else {
+        SDL_OutOfMemory();
+    }
+    return mutex;
+}
+
+/* Free the mutex */
+void
+SDL_DestroyMutex(SDL_mutex * mutex)
+{
+    if (mutex) {
+        if (mutex->sem) {
+            SDL_DestroySemaphore(mutex->sem);
+        }
+        SDL_free(mutex);
+    }
+}
+
+/* Lock the semaphore */
+int
+SDL_mutexP(SDL_mutex * mutex)
+{
+#if SDL_THREADS_DISABLED
+    return 0;
+#else
+    SDL_threadID this_thread;
+
+    if (mutex == NULL) {
+        SDL_SetError("Passed a NULL mutex");
+        return -1;
+    }
+
+    this_thread = SDL_ThreadID();
+    if (mutex->owner == this_thread) {
+        ++mutex->recursive;
+    } else {
+        /* The order of operations is important.
+           We set the locking thread id after we obtain the lock
+           so unlocks from other threads will fail.
+         */
+        SDL_SemWait(mutex->sem);
+        mutex->owner = this_thread;
+        mutex->recursive = 0;
+    }
+
+    return 0;
+#endif /* SDL_THREADS_DISABLED */
+}
+
+/* Unlock the mutex */
+int
+SDL_mutexV(SDL_mutex * mutex)
+{
+#if SDL_THREADS_DISABLED
+    return 0;
+#else
+    if (mutex == NULL) {
+        SDL_SetError("Passed a NULL mutex");
+        return -1;
+    }
+
+    /* If we don't own the mutex, we can't unlock it */
+    if (SDL_ThreadID() != mutex->owner) {
+        SDL_SetError("mutex not owned by this thread");
+        return -1;
+    }
+
+    if (mutex->recursive) {
+        --mutex->recursive;
+    } else {
+        /* The order of operations is important.
+           First reset the owner so another thread doesn't lock
+           the mutex and set the ownership before we reset it,
+           then release the lock semaphore.
+         */
+        mutex->owner = 0;
+        SDL_SemPost(mutex->sem);
+    }
+    return 0;
+#endif /* SDL_THREADS_DISABLED */
+}
+
+/* vi: set ts=4 sw=4 expandtab: */
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/thread/stdcpp/SDL_sysmutex_c.h	Thu Nov 22 23:03:56 2012 -0500
@@ -0,0 +1,22 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_config.h"
+/* vi: set ts=4 sw=4 expandtab: */
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/thread/stdcpp/SDL_systhread.c	Thu Nov 22 23:03:56 2012 -0500
@@ -0,0 +1,59 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_config.h"
+
+/* Thread management routines for SDL */
+
+#include "SDL_thread.h"
+#include "../SDL_systhread.h"
+
+int
+SDL_SYS_CreateThread(SDL_Thread * thread, void *args)
+{
+    SDL_SetError("Threads are not supported on this platform");
+    return (-1);
+}
+
+void
+SDL_SYS_SetupThread(const char *name)
+{
+    return;
+}
+
+SDL_threadID
+SDL_ThreadID(void)
+{
+    return (0);
+}
+
+int
+SDL_SYS_SetThreadPriority(SDL_ThreadPriority priority)
+{
+    return (0);
+}
+
+void
+SDL_SYS_WaitThread(SDL_Thread * thread)
+{
+    return;
+}
+
+/* vi: set ts=4 sw=4 expandtab: */
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/thread/stdcpp/SDL_systhread_c.h	Thu Nov 22 23:03:56 2012 -0500
@@ -0,0 +1,26 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_config.h"
+
+/* For a thread handle, use a void pointer to a std::thread */
+typedef void * SYS_ThreadHandle;
+
+/* vi: set ts=4 sw=4 expandtab: */