Add internal TLS support

Related to #970.

src/cocoa_init.m

@@ -311,9 +311,6 @@ int _glfwPlatformInit(void)
     if (!initializeTIS())
         return GLFW_FALSE;
 
-    if (!_glfwInitThreadLocalStoragePOSIX())
-        return GLFW_FALSE;
-
     _glfwInitTimerNS();
     _glfwInitJoysticksNS();
 
@@ -362,7 +359,6 @@ void _glfwPlatformTerminate(void)
 
     _glfwTerminateNSGL();
     _glfwTerminateJoysticksNS();
-    _glfwTerminateThreadLocalStoragePOSIX();
 
     [_glfw.ns.autoreleasePool release];
     _glfw.ns.autoreleasePool = nil;

src/context.c

@@ -331,7 +331,7 @@ GLFWbool _glfwRefreshContextAttribs(const _GLFWctxconfig* ctxconfig)
         NULL
     };
 
-    window = _glfwPlatformGetCurrentContext();
+    window = _glfwPlatformGetTls(&_glfw.context);
 
     window->context.source = ctxconfig->source;
     window->context.client = GLFW_OPENGL_API;
@@ -578,7 +578,7 @@ GLFWbool _glfwStringInExtensionString(const char* string, const char* extensions
 GLFWAPI void glfwMakeContextCurrent(GLFWwindow* handle)
 {
     _GLFWwindow* window = (_GLFWwindow*) handle;
-    _GLFWwindow* previous = _glfwPlatformGetCurrentContext();
+    _GLFWwindow* previous = _glfwPlatformGetTls(&_glfw.context);
 
     _GLFW_REQUIRE_INIT();
 
@@ -601,7 +601,7 @@ GLFWAPI void glfwMakeContextCurrent(GLFWwindow* handle)
 GLFWAPI GLFWwindow* glfwGetCurrentContext(void)
 {
     _GLFW_REQUIRE_INIT_OR_RETURN(NULL);
-    return (GLFWwindow*) _glfwPlatformGetCurrentContext();
+    return _glfwPlatformGetTls(&_glfw.context);
 }
 
 GLFWAPI void glfwSwapBuffers(GLFWwindow* handle)
@@ -626,7 +626,7 @@ GLFWAPI void glfwSwapInterval(int interval)
 
     _GLFW_REQUIRE_INIT();
 
-    window = _glfwPlatformGetCurrentContext();
+    window = _glfwPlatformGetTls(&_glfw.context);
     if (!window)
     {
         _glfwInputError(GLFW_NO_CURRENT_CONTEXT, NULL);
@@ -643,7 +643,7 @@ GLFWAPI int glfwExtensionSupported(const char* extension)
 
     _GLFW_REQUIRE_INIT_OR_RETURN(GLFW_FALSE);
 
-    window = _glfwPlatformGetCurrentContext();
+    window = _glfwPlatformGetTls(&_glfw.context);
     if (!window)
     {
         _glfwInputError(GLFW_NO_CURRENT_CONTEXT, NULL);
@@ -708,7 +708,7 @@ GLFWAPI GLFWglproc glfwGetProcAddress(const char* procname)
 
     _GLFW_REQUIRE_INIT_OR_RETURN(NULL);
 
-    window = _glfwPlatformGetCurrentContext();
+    window = _glfwPlatformGetTls(&_glfw.context);
     if (!window)
     {
         _glfwInputError(GLFW_NO_CURRENT_CONTEXT, NULL);

src/egl_context.c

@@ -199,12 +199,12 @@ static void makeContextCurrentEGL(_GLFWwindow* window)
         }
     }
 
-    _glfwPlatformSetCurrentContext(window);
+    _glfwPlatformSetTls(&_glfw.context, window);
 }
 
 static void swapBuffersEGL(_GLFWwindow* window)
 {
-    if (window != _glfwPlatformGetCurrentContext())
+    if (window != _glfwPlatformGetTls(&_glfw.context))
     {
         _glfwInputError(GLFW_PLATFORM_ERROR,
                         "EGL: The context must be current on the calling thread when swapping buffers");
@@ -233,7 +233,7 @@ static int extensionSupportedEGL(const char* extension)
 
 static GLFWglproc getProcAddressEGL(const char* procname)
 {
-    _GLFWwindow* window = _glfwPlatformGetCurrentContext();
+    _GLFWwindow* window = _glfwPlatformGetTls(&_glfw.context);
 
     if (window->context.egl.client)
     {

src/glx_context.c

@@ -165,7 +165,7 @@ static void makeContextCurrentGLX(_GLFWwindow* window)
         }
     }
 
-    _glfwPlatformSetCurrentContext(window);
+    _glfwPlatformSetTls(&_glfw.context, window);
 }
 
 static void swapBuffersGLX(_GLFWwindow* window)
@@ -175,7 +175,7 @@ static void swapBuffersGLX(_GLFWwindow* window)
 
 static void swapIntervalGLX(int interval)
 {
-    _GLFWwindow* window = _glfwPlatformGetCurrentContext();
+    _GLFWwindow* window = _glfwPlatformGetTls(&_glfw.context);
 
     if (_glfw.glx.EXT_swap_control)
     {

src/init.c

@@ -113,6 +113,8 @@ static void terminate(void)
     _glfwTerminateVulkan();
     _glfwPlatformTerminate();
 
+    _glfwPlatformDestroyTls(&_glfw.context);
+
     memset(&_glfw, 0, sizeof(_glfw));
 }
 
@@ -162,6 +164,9 @@ GLFWAPI int glfwInit(void)
     memset(&_glfw, 0, sizeof(_glfw));
     _glfw.hints.init = _glfwInitHints;
 
+    if (!_glfwPlatformCreateTls(&_glfw.context))
+        return GLFW_FALSE;
+
     if (!_glfwPlatformInit())
     {
         terminate();

src/internal.h

@@ -69,6 +69,7 @@ typedef struct _GLFWlibrary     _GLFWlibrary;
 typedef struct _GLFWmonitor     _GLFWmonitor;
 typedef struct _GLFWcursor      _GLFWcursor;
 typedef struct _GLFWjoystick    _GLFWjoystick;
+typedef struct _GLFWtls         _GLFWtls;
 
 typedef void (* _GLFWmakecontextcurrentfun)(_GLFWwindow*);
 typedef void (* _GLFWswapbuffersfun)(_GLFWwindow*);
@@ -485,6 +486,14 @@ struct _GLFWjoystick
     _GLFW_PLATFORM_JOYSTICK_STATE;
 };
 
+/*! @brief Thread local storage structure.
+ */
+struct _GLFWtls
+{
+    // This is defined in the platform's tls.h
+    _GLFW_PLATFORM_TLS_STATE;
+};
+
 /*! @brief Library global data.
  */
 struct _GLFWlibrary
@@ -510,6 +519,8 @@ struct _GLFWlibrary
 
     uint64_t            timerOffset;
 
+    _GLFWtls            context;
+
     struct {
         GLFWbool        available;
         void*           handle;
@@ -546,8 +557,6 @@ struct _GLFWlibrary
     _GLFW_PLATFORM_LIBRARY_TIME_STATE;
     // This is defined in the platform's joystick.h
     _GLFW_PLATFORM_LIBRARY_JOYSTICK_STATE;
-    // This is defined in the platform's tls.h
-    _GLFW_PLATFORM_LIBRARY_TLS_STATE;
     // This is defined in egl_context.h
     _GLFW_EGL_LIBRARY_CONTEXT_STATE;
     // This is defined in osmesa_context.h
@@ -634,13 +643,15 @@ void _glfwPlatformWaitEvents(void);
 void _glfwPlatformWaitEventsTimeout(double timeout);
 void _glfwPlatformPostEmptyEvent(void);
 
-void _glfwPlatformSetCurrentContext(_GLFWwindow* context);
-_GLFWwindow* _glfwPlatformGetCurrentContext(void);
-
 void _glfwPlatformGetRequiredInstanceExtensions(char** extensions);
 int _glfwPlatformGetPhysicalDevicePresentationSupport(VkInstance instance, VkPhysicalDevice device, uint32_t queuefamily);
 VkResult _glfwPlatformCreateWindowSurface(VkInstance instance, _GLFWwindow* window, const VkAllocationCallbacks* allocator, VkSurfaceKHR* surface);
 
+GLFWbool _glfwPlatformCreateTls(_GLFWtls* tls);
+void _glfwPlatformDestroyTls(_GLFWtls* tls);
+void* _glfwPlatformGetTls(_GLFWtls* tls);
+void _glfwPlatformSetTls(_GLFWtls* tls, void* value);
+
 /*! @} */
 
 

src/mir_init.c

@@ -190,9 +190,6 @@ int _glfwPlatformInit(void)
 
     createKeyTables();
 
-    if (!_glfwInitThreadLocalStoragePOSIX())
-        return GLFW_FALSE;
-
     if (!_glfwInitJoysticksLinux())
         return GLFW_FALSE;
 
@@ -222,7 +219,6 @@ void _glfwPlatformTerminate(void)
 {
     _glfwTerminateEGL();
     _glfwTerminateJoysticksLinux();
-    _glfwTerminateThreadLocalStoragePOSIX();
 
     _glfwDeleteEventQueueMir(_glfw.mir.eventQueue);
 

src/nsgl_context.m

@@ -34,7 +34,7 @@ static void makeContextCurrentNSGL(_GLFWwindow* window)
     else
         [NSOpenGLContext clearCurrentContext];
 
-    _glfwPlatformSetCurrentContext(window);
+    _glfwPlatformSetTls(&_glfw.context, window);
 }
 
 static void swapBuffersNSGL(_GLFWwindow* window)
@@ -45,7 +45,7 @@ static void swapBuffersNSGL(_GLFWwindow* window)
 
 static void swapIntervalNSGL(int interval)
 {
-    _GLFWwindow* window = _glfwPlatformGetCurrentContext();
+    _GLFWwindow* window = _glfwPlatformGetTls(&_glfw.context);
 
     GLint sync = interval;
     [window->context.nsgl.object setValues:&sync

src/null_init.c

@@ -34,9 +34,6 @@
 
 int _glfwPlatformInit(void)
 {
-    if (!_glfwInitThreadLocalStoragePOSIX())
-        return GLFW_FALSE;
-
     _glfwInitTimerPOSIX();
     return GLFW_TRUE;
 }
@@ -44,7 +41,6 @@ int _glfwPlatformInit(void)
 void _glfwPlatformTerminate(void)
 {
     _glfwTerminateOSMesa();
-    _glfwTerminateThreadLocalStoragePOSIX();
 }
 
 const char* _glfwPlatformGetVersionString(void)

src/osmesa_context.c

@@ -63,7 +63,7 @@ static void makeContextCurrentOSMesa(_GLFWwindow* window)
         }
     }
 
-    _glfwPlatformSetCurrentContext(window);
+    _glfwPlatformSetTls(&_glfw.context, window);
 }
 
 static GLFWglproc getProcAddressOSMesa(const char* procname)

src/posix_tls.c

@@ -27,42 +27,46 @@
 
 #include "internal.h"
 
-
-//////////////////////////////////////////////////////////////////////////
-//////                       GLFW internal API                      //////
-//////////////////////////////////////////////////////////////////////////
-
-GLFWbool _glfwInitThreadLocalStoragePOSIX(void)
-{
-    if (pthread_key_create(&_glfw.posix_tls.context, NULL) != 0)
-    {
-        _glfwInputError(GLFW_PLATFORM_ERROR,
-                        "POSIX: Failed to create context TLS");
-        return GLFW_FALSE;
-    }
-
-    _glfw.posix_tls.allocated = GLFW_TRUE;
-    return GLFW_TRUE;
-}
-
-void _glfwTerminateThreadLocalStoragePOSIX(void)
-{
-    if (_glfw.posix_tls.allocated)
-        pthread_key_delete(_glfw.posix_tls.context);
-}
+#include <assert.h>
+#include <string.h>
 
 
 //////////////////////////////////////////////////////////////////////////
 //////                       GLFW platform API                      //////
 //////////////////////////////////////////////////////////////////////////
 
-void _glfwPlatformSetCurrentContext(_GLFWwindow* context)
+GLFWbool _glfwPlatformCreateTls(_GLFWtls* tls)
 {
-    pthread_setspecific(_glfw.posix_tls.context, context);
+    assert(tls->posix.allocated == GLFW_FALSE);
+
+    if (pthread_key_create(&tls->posix.key, NULL) != 0)
+    {
+        _glfwInputError(GLFW_PLATFORM_ERROR,
+                        "POSIX: Failed to create context TLS");
+        return GLFW_FALSE;
+    }
+
+    tls->posix.allocated = GLFW_TRUE;
+    return GLFW_TRUE;
 }
 
-_GLFWwindow* _glfwPlatformGetCurrentContext(void)
+void _glfwPlatformDestroyTls(_GLFWtls* tls)
 {
-    return pthread_getspecific(_glfw.posix_tls.context);
+    assert(tls->posix.allocated == GLFW_TRUE);
+    if (tls->posix.allocated)
+        pthread_key_delete(tls->posix.key);
+    memset(tls, 0, sizeof(_GLFWtls));
+}
+
+void* _glfwPlatformGetTls(_GLFWtls* tls)
+{
+    assert(tls->posix.allocated == GLFW_TRUE);
+    return pthread_getspecific(tls->posix.key);
+}
+
+void _glfwPlatformSetTls(_GLFWtls* tls, void* value)
+{
+    assert(tls->posix.allocated == GLFW_TRUE);
+    pthread_setspecific(tls->posix.key, value);
 }
 

src/posix_tls.h

@@ -30,20 +30,17 @@
 
 #include <pthread.h>
 
-#define _GLFW_PLATFORM_LIBRARY_TLS_STATE _GLFWtlsPOSIX posix_tls
+#define _GLFW_PLATFORM_TLS_STATE _GLFWtlsPOSIX posix
 
 
-// POSIX-specific global TLS data
+// POSIX-specific thread local storage data
 //
 typedef struct _GLFWtlsPOSIX
 {
     GLFWbool        allocated;
-    pthread_key_t   context;
+    pthread_key_t   key;
 
 } _GLFWtlsPOSIX;
 
 
-GLFWbool _glfwInitThreadLocalStoragePOSIX(void);
-void _glfwTerminateThreadLocalStoragePOSIX(void);
-
 #endif // _glfw3_posix_tls_h_

src/wgl_context.c

@@ -233,12 +233,12 @@ static void makeContextCurrentWGL(_GLFWwindow* window)
     if (window)
     {
         if (wglMakeCurrent(window->context.wgl.dc, window->context.wgl.handle))
-            _glfwPlatformSetCurrentContext(window);
+            _glfwPlatformSetTls(&_glfw.context, window);
         else
         {
             _glfwInputErrorWin32(GLFW_PLATFORM_ERROR,
                                  "WGL: Failed to make context current");
-            _glfwPlatformSetCurrentContext(NULL);
+            _glfwPlatformSetTls(&_glfw.context, NULL);
         }
     }
     else
@@ -249,7 +249,7 @@ static void makeContextCurrentWGL(_GLFWwindow* window)
                                  "WGL: Failed to clear current context");
         }
 
-        _glfwPlatformSetCurrentContext(NULL);
+        _glfwPlatformSetTls(&_glfw.context, NULL);
     }
 }
 
@@ -268,7 +268,7 @@ static void swapBuffersWGL(_GLFWwindow* window)
 
 static void swapIntervalWGL(int interval)
 {
-    _GLFWwindow* window = _glfwPlatformGetCurrentContext();
+    _GLFWwindow* window = _glfwPlatformGetTls(&_glfw.context);
 
     window->context.wgl.interval = interval;
 

src/win32_init.c

@@ -435,9 +435,6 @@ void _glfwInputErrorWin32(int error, const char* description)
 
 int _glfwPlatformInit(void)
 {
-    if (!_glfwInitThreadLocalStorageWin32())
-        return GLFW_FALSE;
-
     // To make SetForegroundWindow work as we want, we need to fiddle
     // with the FOREGROUNDLOCKTIMEOUT system setting (we do this as early
     // as possible in the hope of still being the foreground process)
@@ -489,7 +486,6 @@ void _glfwPlatformTerminate(void)
     _glfwTerminateEGL();
 
     _glfwTerminateJoysticksWin32();
-    _glfwTerminateThreadLocalStorageWin32();
 
     freeLibraries();
 }

src/win32_platform.h

@@ -221,9 +221,9 @@ typedef VkBool32 (APIENTRY *PFN_vkGetPhysicalDeviceWin32PresentationSupportKHR)(
 #define _GLFW_PLATFORM_WINDOW_STATE         _GLFWwindowWin32  win32
 #define _GLFW_PLATFORM_LIBRARY_WINDOW_STATE _GLFWlibraryWin32 win32
 #define _GLFW_PLATFORM_LIBRARY_TIME_STATE   _GLFWtimeWin32    win32_time
-#define _GLFW_PLATFORM_LIBRARY_TLS_STATE    _GLFWtlsWin32     win32_tls
 #define _GLFW_PLATFORM_MONITOR_STATE        _GLFWmonitorWin32 win32
 #define _GLFW_PLATFORM_CURSOR_STATE         _GLFWcursorWin32  win32
+#define _GLFW_PLATFORM_TLS_STATE            _GLFWtlsWin32     win32
 
 
 // Win32-specific per-window data
@@ -328,12 +328,12 @@ typedef struct _GLFWtimeWin32
 
 } _GLFWtimeWin32;
 
-// Win32-specific global TLS data
+// Win32-specific thread local storage data
 //
 typedef struct _GLFWtlsWin32
 {
     GLFWbool            allocated;
-    DWORD               context;
+    DWORD               index;
 
 } _GLFWtlsWin32;
 
@@ -341,9 +341,6 @@ typedef struct _GLFWtlsWin32
 GLFWbool _glfwRegisterWindowClassWin32(void);
 void _glfwUnregisterWindowClassWin32(void);
 
-GLFWbool _glfwInitThreadLocalStorageWin32(void);
-void _glfwTerminateThreadLocalStorageWin32(void);
-
 WCHAR* _glfwCreateWideStringFromUTF8Win32(const char* source);
 char* _glfwCreateUTF8FromWideStringWin32(const WCHAR* source);
 void _glfwInputErrorWin32(int error, const char* description);

src/win32_tls.c

@@ -27,43 +27,46 @@
 
 #include "internal.h"
 
-
-//////////////////////////////////////////////////////////////////////////
-//////                       GLFW internal API                      //////
-//////////////////////////////////////////////////////////////////////////
-
-GLFWbool _glfwInitThreadLocalStorageWin32(void)
-{
-    _glfw.win32_tls.context = TlsAlloc();
-    if (_glfw.win32_tls.context == TLS_OUT_OF_INDEXES)
-    {
-        _glfwInputErrorWin32(GLFW_PLATFORM_ERROR,
-                             "Win32: Failed to allocate TLS index");
-        return GLFW_FALSE;
-    }
-
-    _glfw.win32_tls.allocated = GLFW_TRUE;
-    return GLFW_TRUE;
-}
-
-void _glfwTerminateThreadLocalStorageWin32(void)
-{
-    if (_glfw.win32_tls.allocated)
-        TlsFree(_glfw.win32_tls.context);
-}
+#include <assert.h>
 
 
 //////////////////////////////////////////////////////////////////////////
 //////                       GLFW platform API                      //////
 //////////////////////////////////////////////////////////////////////////
 
-void _glfwPlatformSetCurrentContext(_GLFWwindow* context)
+GLFWbool _glfwPlatformCreateTls(_GLFWtls* tls)
 {
-    TlsSetValue(_glfw.win32_tls.context, context);
+    assert(tls->win32.allocated == GLFW_FALSE);
+
+    tls->win32.index = TlsAlloc();
+    if (tls->win32.index == TLS_OUT_OF_INDEXES)
+    {
+        _glfwInputErrorWin32(GLFW_PLATFORM_ERROR,
+                             "Win32: Failed to allocate TLS index");
+        return GLFW_FALSE;
+    }
+
+    tls->win32.allocated = GLFW_TRUE;
+    return GLFW_TRUE;
 }
 
-_GLFWwindow* _glfwPlatformGetCurrentContext(void)
+void _glfwPlatformDestroyTls(_GLFWtls* tls)
 {
-    return TlsGetValue(_glfw.win32_tls.context);
+    assert(tls->win32.allocated == GLFW_TRUE);
+    if (tls->win32.allocated)
+        TlsFree(tls->win32.index);
+    memset(tls, 0, sizeof(_GLFWtls));
+}
+
+void* _glfwPlatformGetTls(_GLFWtls* tls)
+{
+    assert(tls->win32.allocated == GLFW_TRUE);
+    return TlsGetValue(tls->win32.index);
+}
+
+void _glfwPlatformSetTls(_GLFWtls* tls, void* value)
+{
+    assert(tls->win32.allocated == GLFW_TRUE);
+    TlsSetValue(tls->win32.index, value);
 }
 

src/window.c

@@ -192,7 +192,7 @@ GLFWAPI GLFWwindow* glfwCreateWindow(int width, int height,
     window->denom       = GLFW_DONT_CARE;
 
     // Save the currently current context so it can be restored later
-    previous = _glfwPlatformGetCurrentContext();
+    previous = _glfwPlatformGetTls(&_glfw.context);
     if (ctxconfig.client != GLFW_NO_API)
         glfwMakeContextCurrent(NULL);
 
@@ -408,7 +408,7 @@ GLFWAPI void glfwDestroyWindow(GLFWwindow* handle)
 
     // The window's context must not be current on another thread when the
     // window is destroyed
-    if (window == _glfwPlatformGetCurrentContext())
+    if (window == _glfwPlatformGetTls(&_glfw.context))
         glfwMakeContextCurrent(NULL);
 
     _glfwPlatformDestroyWindow(window);

src/wl_init.c

@@ -667,9 +667,6 @@ int _glfwPlatformInit(void)
     // Sync so we got all initial output events
     wl_display_roundtrip(_glfw.wl.display);
 
-    if (!_glfwInitThreadLocalStoragePOSIX())
-        return GLFW_FALSE;
-
     if (!_glfwInitJoysticksLinux())
         return GLFW_FALSE;
 
@@ -695,7 +692,6 @@ void _glfwPlatformTerminate(void)
 {
     _glfwTerminateEGL();
     _glfwTerminateJoysticksLinux();
-    _glfwTerminateThreadLocalStoragePOSIX();
 
     xkb_compose_state_unref(_glfw.wl.xkb.composeState);
     xkb_keymap_unref(_glfw.wl.xkb.keymap);

src/x11_init.c

@@ -822,9 +822,6 @@ int _glfwPlatformInit(void)
         }
     }
 
-    if (!_glfwInitThreadLocalStoragePOSIX())
-        return GLFW_FALSE;
-
 #if defined(__linux__)
     if (!_glfwInitJoysticksLinux())
         return GLFW_FALSE;
@@ -885,7 +882,6 @@ void _glfwPlatformTerminate(void)
 #if defined(__linux__)
     _glfwTerminateJoysticksLinux();
 #endif
-    _glfwTerminateThreadLocalStoragePOSIX();
 }
 
 const char* _glfwPlatformGetVersionString(void)