Made httplib_pthread_cond_signal global

doc/api/httplib_pthread_cond_signal.md

@@ -0,0 +1,27 @@
+# LibHTTP API Reference
+
+### `httplib_pthread_cond_signal( cv );`
+
+### Parameters
+
+| Parameter | Type | Description |
+| :--- | :--- | :--- |
+|**`cv`**|`pthread_cond_t *`|The condition which a thread is waiting on|
+
+### Return Value
+
+| Type | Description |
+| :--- | :--- |
+|`int`|Integer value with a success or error code of the function call|
+
+### Description
+
+The platform independent function `httplib_pthread_cond_signal()` unlocks one thread waiting on a specific condition. The function returns **0** when successful and an error code otherwise. On systems which support it, the functionality is implemented as a direct call to `pthread_cond_signal()`. Otherwise an OS dependent alternative implementation is used to emulate the same behavior.
+
+### See Also
+
+* [`httplib_pthread_cond_broadcast();`](httplib_pthread_cond_broadcast.md)
+* [`httplib_pthread_cond_destroy();`](httplib_pthread_cond_destroy.md)
+* [`httplib_pthread_cond_init();`](httplib_pthread_cond_init.md)
+* [`httplib_pthread_cond_timedwait();`](httplib_pthread_cond_timedwait.md)
+* [`httplib_pthread_cond_wait();`](httplib_pthread_cond_wait.md)