Added glfwIsInit()

include/GLFW/glfw3.h

@@ -1553,6 +1553,8 @@ typedef struct GLFWgamepadstate
  *
  *  Additional calls to this function after successful initialization but before
  *  termination will return `GLFW_TRUE` immediately.
+ *	
+ *	To check whether GLFW has been initializd, call @ref glfwIsInit.
  *
  *  @return `GLFW_TRUE` if successful, or `GLFW_FALSE` if an
  *  [error](@ref error_handling) occurred.
@@ -1568,6 +1570,7 @@ typedef struct GLFWgamepadstate
  *
  *  @sa @ref intro_init
  *  @sa @ref glfwTerminate
+ *	@sa @ref glfwIsInit
  *
  *  @since Added in version 1.0.
  *
@@ -1575,6 +1578,24 @@ typedef struct GLFWgamepadstate
  */
 GLFWAPI int glfwInit(void);
 
+
+/*! @brief Checks if GLFW has been initialized
+ *	
+ *	This function checks the state of GLFW and returns whether it is initalized.
+ *	Before most GLFW functions, GLFW must be initialized via @ref glfwInit.  @ref glfwTerminate
+ *	frees any remaining resources by GLFW and should be called at the end of the application.
+ *
+ *	@return `GLFW_TRUE` if initialized, `GLFW_FALSE` otherwise
+ *
+ *	@sa @ref intro_init
+ *	@sa @ref glfwInit
+ *	@sa @ref glfwTerminate
+ *	@since Added in version 3.2.1
+ *
+ *	@ingroup init
+*/
+GLFWAPI GLFWbool glfwIsInit(void);
+
 /*! @brief Terminates the GLFW library.
  *
  *  This function destroys all remaining windows and cursors, restores any
@@ -1600,6 +1621,7 @@ GLFWAPI int glfwInit(void);
  *
  *  @sa @ref intro_init
  *  @sa @ref glfwInit
+ *	@sa @ref glfwIsInit
  *
  *  @since Added in version 1.0.
  *

src/init.c

@@ -220,6 +220,11 @@ GLFWAPI int glfwInit(void)
     return GLFW_TRUE;
 }
 
+GLFWAPI GLFWbool glfwIsInit(void)
+{
+	return _glfw.initialized;
+}
+
 GLFWAPI void glfwTerminate(void)
 {
     if (!_glfw.initialized)