GLFW: Make joystick platform code init on demand

From upstream: 782e6b6cef.

glfw/cocoa_init.m

@@ -669,8 +669,6 @@ int _glfwPlatformInit(void)
     if (!initializeTIS())
         return false;
 
-    _glfwInitJoysticksNS();
-
     _glfwPollMonitorsNS();
     return true;
 
@@ -723,7 +721,6 @@ void _glfwPlatformTerminate(void)
     free(_glfw.ns.clipboardString);
 
     _glfwTerminateNSGL();
-    _glfwTerminateJoysticksNS();
 
     } // autoreleasepool
 }

glfw/cocoa_joystick.h

@@ -44,7 +44,3 @@ typedef struct _GLFWjoystickNS
     CFMutableArrayRef   hats;
 } _GLFWjoystickNS;
 
-
-void _glfwInitJoysticksNS(void);
-void _glfwTerminateJoysticksNS(void);
-

glfw/cocoa_joystick.m

@@ -296,7 +296,7 @@ static void removeCallback(void* context UNUSED,
 
 // Initialize joystick interface
 //
-void _glfwInitJoysticksNS(void)
+bool _glfwPlatformInitJoysticks(void)
 {
     CFMutableArrayRef matching;
     const long usages[] =
@@ -315,7 +315,7 @@ void _glfwInitJoysticksNS(void)
     if (!matching)
     {
         _glfwInputError(GLFW_PLATFORM_ERROR, "Cocoa: Failed to create array");
-        return;
+        return false;
     }
 
     for (size_t i = 0;  i < sizeof(usages) / sizeof(long);  i++)
@@ -370,19 +370,23 @@ void _glfwInitJoysticksNS(void)
     // Execute the run loop once in order to register any initially-attached
     // joysticks
     CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0, false);
+    return true;
 }
 
 // Close all opened joystick handles
 //
-void _glfwTerminateJoysticksNS(void)
+void _glfwPlatformTerminateJoysticks(void)
 {
     int jid;
 
     for (jid = 0;  jid <= GLFW_JOYSTICK_LAST;  jid++)
         closeJoystick(_glfw.joysticks + jid);
 
-    CFRelease(_glfw.ns.hidManager);
-    _glfw.ns.hidManager = NULL;
+    if (_glfw.ns.hidManager)
+    {
+        CFRelease(_glfw.ns.hidManager);
+        _glfw.ns.hidManager = NULL;
+    }
 }
 
 

glfw/init.c

@@ -92,6 +92,7 @@ static void terminate(void)
     _glfw.mappingCount = 0;
 
     _glfwTerminateVulkan();
+    _glfwPlatformTerminateJoysticks();
     _glfwPlatformTerminate();
 
     _glfw.initialized = false;

glfw/input.c

@@ -44,6 +44,22 @@
 #define _GLFW_JOYSTICK_BUTTON   2
 #define _GLFW_JOYSTICK_HATBIT   3
 
+// Initializes the platform joystick API if it has not been already
+//
+static bool initJoysticks(void)
+{
+    if (!_glfw.joysticksInitialized)
+    {
+        if (!_glfwPlatformInitJoysticks())
+        {
+            _glfwPlatformTerminateJoysticks();
+            return false;
+        }
+    }
+
+    return _glfw.joysticksInitialized = true;
+}
+
 // Finds a mapping based on joystick GUID
 //
 static _GLFWmapping* findMapping(const char* guid)
@@ -1101,6 +1117,9 @@ GLFWAPI int glfwJoystickPresent(int jid)
         return false;
     }
 
+    if (!initJoysticks())
+        return false;
+
     js = _glfw.joysticks + jid;
     if (!js->present)
         return false;
@@ -1126,6 +1145,9 @@ GLFWAPI const float* glfwGetJoystickAxes(int jid, int* count)
         return NULL;
     }
 
+    if (!initJoysticks())
+        return NULL;
+
     js = _glfw.joysticks + jid;
     if (!js->present)
         return NULL;
@@ -1155,6 +1177,9 @@ GLFWAPI const unsigned char* glfwGetJoystickButtons(int jid, int* count)
         return NULL;
     }
 
+    if (!initJoysticks())
+        return NULL;
+
     js = _glfw.joysticks + jid;
     if (!js->present)
         return NULL;
@@ -1188,6 +1213,9 @@ GLFWAPI const unsigned char* glfwGetJoystickHats(int jid, int* count)
         return NULL;
     }
 
+    if (!initJoysticks())
+        return NULL;
+
     js = _glfw.joysticks + jid;
     if (!js->present)
         return NULL;
@@ -1214,6 +1242,9 @@ GLFWAPI const char* glfwGetJoystickName(int jid)
         return NULL;
     }
 
+    if (!initJoysticks())
+        return NULL;
+
     js = _glfw.joysticks + jid;
     if (!js->present)
         return NULL;
@@ -1239,6 +1270,9 @@ GLFWAPI const char* glfwGetJoystickGUID(int jid)
         return NULL;
     }
 
+    if (!initJoysticks())
+        return NULL;
+
     js = _glfw.joysticks + jid;
     if (!js->present)
         return NULL;
@@ -1284,6 +1318,10 @@ GLFWAPI void* glfwGetJoystickUserPointer(int jid)
 GLFWAPI GLFWjoystickfun glfwSetJoystickCallback(GLFWjoystickfun cbfun)
 {
     _GLFW_REQUIRE_INIT_OR_RETURN(NULL);
+
+    if (!initJoysticks())
+        return NULL;
+
     _GLFW_SWAP_POINTERS(_glfw.callbacks.joystick, cbfun);
     return cbfun;
 }
@@ -1363,6 +1401,9 @@ GLFWAPI int glfwJoystickIsGamepad(int jid)
         return false;
     }
 
+    if (!initJoysticks())
+        return false;
+
     js = _glfw.joysticks + jid;
     if (!js->present)
         return false;
@@ -1388,6 +1429,9 @@ GLFWAPI const char* glfwGetGamepadName(int jid)
         return NULL;
     }
 
+    if (!initJoysticks())
+        return NULL;
+
     js = _glfw.joysticks + jid;
     if (!js->present)
         return NULL;
@@ -1420,6 +1464,9 @@ GLFWAPI int glfwGetGamepadState(int jid, GLFWgamepadstate* state)
         return false;
     }
 
+    if (!initJoysticks())
+        return false;
+
     js = _glfw.joysticks + jid;
     if (!js->present)
         return false;

glfw/internal.h

@@ -574,6 +574,7 @@ struct _GLFWlibrary
     _GLFWmonitor**      monitors;
     int                 monitorCount;
 
+    bool                joysticksInitialized;
     _GLFWjoystick       joysticks[GLFW_JOYSTICK_LAST + 1];
     _GLFWmapping*       mappings;
     int                 mappingCount;
@@ -667,6 +668,8 @@ void _glfwPlatformSetPrimarySelectionString(const char* string);
 const char* _glfwPlatformGetPrimarySelectionString(void);
 #endif
 
+bool _glfwPlatformInitJoysticks(void);
+void _glfwPlatformTerminateJoysticks(void);
 int _glfwPlatformPollJoystick(_GLFWjoystick* js, int mode);
 void _glfwPlatformUpdateGamepadGUID(char* guid);
 

glfw/linux_joystick.c

@@ -266,7 +266,7 @@ static int compareJoysticks(const void* fp, const void* sp)
 
 // Initialize joystick interface
 //
-bool _glfwInitJoysticksLinux(void)
+bool _glfwPlatformInitJoysticks(void)
 {
     const char* dirname = "/dev/input";
 
@@ -322,7 +322,7 @@ bool _glfwInitJoysticksLinux(void)
 
 // Close all opened joystick handles
 //
-void _glfwTerminateJoysticksLinux(void)
+void _glfwPlatformTerminateJoysticks(void)
 {
     int jid;
 
@@ -333,14 +333,13 @@ void _glfwTerminateJoysticksLinux(void)
             closeJoystick(js);
     }
 
-    regfree(&_glfw.linjs.regex);
-
     if (_glfw.linjs.inotify > 0)
     {
         if (_glfw.linjs.watch > 0)
             inotify_rm_watch(_glfw.linjs.inotify, _glfw.linjs.watch);
 
         close(_glfw.linjs.inotify);
+        regfree(&_glfw.linjs.regex);
     }
 }
 

glfw/linux_joystick.h

@@ -55,7 +55,4 @@ typedef struct _GLFWlibraryLinux
     bool                    dropped;
 } _GLFWlibraryLinux;
 
-
-bool _glfwInitJoysticksLinux(void);
-void _glfwTerminateJoysticksLinux(void);
 void _glfwDetectJoystickConnectionLinux(void);

glfw/null_joystick.c

@@ -33,6 +33,15 @@
 //////                       GLFW platform API                      //////
 //////////////////////////////////////////////////////////////////////////
 
+int _glfwPlatformInitJoysticks(void)
+{
+    return true;
+}
+
+void _glfwPlatformTerminateJoysticks(void)
+{
+}
+
 int _glfwPlatformPollJoystick(_GLFWjoystick* js UNUSED, int mode UNUSED)
 {
     return false;

glfw/wl_init.c

@@ -771,11 +771,6 @@ int _glfwPlatformInit(void)
     // Sync so we got all initial output events
     wl_display_roundtrip(_glfw.wl.display);
 
-#ifdef __linux__
-    if (!_glfwInitJoysticksLinux())
-        return false;
-#endif
-
     if (!_glfw.wl.wmBase)
     {
         _glfwInputError(GLFW_PLATFORM_ERROR,
@@ -799,9 +794,6 @@ int _glfwPlatformInit(void)
 
 void _glfwPlatformTerminate(void)
 {
-#ifdef __linux__
-    _glfwTerminateJoysticksLinux();
-#endif
     _glfwTerminateEGL();
     if (_glfw.wl.egl.handle)
     {

glfw/x11_init.c

@@ -653,13 +653,6 @@ int _glfwPlatformInit(void)
     _glfw.x11.helperWindowHandle = createHelperWindow();
     _glfw.x11.hiddenCursorHandle = createHiddenCursor();
 
-#if defined(__linux__)
-    if (!_glfwInitJoysticksLinux())
-        return false;
-    if (_glfw.linjs.inotify > 0)
-        addWatch(&_glfw.x11.eventLoopData, "joystick", _glfw.linjs.inotify, POLLIN, 1, NULL, NULL);
-#endif
-
     _glfwPollMonitorsX11();
     return true;
 }
@@ -738,9 +731,6 @@ void _glfwPlatformTerminate(void)
     _glfwTerminateEGL();
     _glfwTerminateGLX();
 
-#if defined(__linux__)
-    _glfwTerminateJoysticksLinux();
-#endif
     finalizePollData(&_glfw.x11.eventLoopData);
 }