From 65a1294eecb6f275cad0a403799a72904b28dddf Mon Sep 17 00:00:00 2001 From: richardbarry Date: Wed, 5 Dec 2007 21:50:00 +0000 Subject: [PATCH] Update documentation to correct spelling. git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@126 1d2547de-c912-0410-9cb9-b8ca96c0e9e2 --- Source/include/semphr.h | 28 +++++++++++++++------------- 1 file changed, 15 insertions(+), 13 deletions(-) diff --git a/Source/include/semphr.h b/Source/include/semphr.h index 1c9b18c6d..75d6e8a33 100644 --- a/Source/include/semphr.h +++ b/Source/include/semphr.h @@ -345,18 +345,16 @@ typedef xQueueHandle xSemaphoreHandle; /** * semphr. h - *
vSemaphoreCreateCounting( xSemaphoreHandle xSemaphore, unsigned portBASE_TYPE uxMaxCount )
+ *
xSemaphoreHandle xSemaphoreCreateCounting( uxCountValue, uxInitialCount )
* * Macro that creates a counting semaphore by using the existing - * queue mechanism. The queue length is used as the maximum count. The data - * size is 0 as we don't want to actually store any data - we just want to - * know if the queue is empty or full. + * queue mechanism. * * Counting semaphores are typically used for two things: * * 1) Counting events. * - * In this usage scenario an event handler will 'give' a semphore each time + * In this usage scenario an event handler will 'give' a semaphore each time * an event occurs (incrementing the semaphore count value), and a handler * task will 'take' a semaphore each time it processes an event * (decrementing the semaphore count value). The count value is therefore @@ -368,17 +366,20 @@ typedef xQueueHandle xSemaphoreHandle; * * In this usage scenario the count value indicates the number of resources * available. To obtain control of a resource a task must first obtain a - * semphoare - decrementing the semaphore count value. When the count value + * semaphore - decrementing the semaphore count value. When the count value * reaches zero there are no free resources. When a task finishes with the - * resource it 'gives' the semahore back - incrementing the semaphore count + * resource it 'gives' the semaphore back - incrementing the semaphore count * value. In this case it is desirable for the initial count value to be * equal to the maximum count value, indicating that all resources are free. * * @param uxMaxCount The maximum count value that can be reached. When the - * semaphore reaches this value it can nolonger be 'given'. - * @param uxInitialCount + * semaphore reaches this value it can no longer be 'given'. * - * @return Handle to the created semaphore. Should be of type xSemaphoreHandle. + * @param uxInitialCount The count value assigned to the semaphore when it is + * created. + * + * @return Handle to the created semaphore. Null if the semaphore could not be + * created. * * Example usage:
@@ -388,9 +389,10 @@ typedef xQueueHandle xSemaphoreHandle;
  {
  xSemaphoreHandle xSemaphore = NULL;
 
-    // Semaphore cannot be used before a call to vSemaphoreCreateCounting().
-    // This is a macro so pass the variable in directly.
-    vSemaphoreCreateBinary( xSemaphore,  );
+    // Semaphore cannot be used before a call to xSemaphoreCreateCounting().
+    // The max value to which the semaphore can count should be 10, and the
+    // initial value assigned to the count should be 0.
+    xSemaphore = xSemaphoreCreateCounting( 10, 0 );
 
     if( xSemaphore != NULL )
     {
-- 
2.39.2