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-rw-r--r--src/gos/sys_defs.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/src/gos/sys_defs.h b/src/gos/sys_defs.h
index b86d6d6a..4014e791 100644
--- a/src/gos/sys_defs.h
+++ b/src/gos/sys_defs.h
@@ -328,6 +328,19 @@
bool_t gfxSemWait(gfxSem *psem, delaytime_t ms);
/**
+ * @brief Test if a wait on a semaphore can be satisfied immediately
+ * @details Equivalent to @p gfxSemWait(psem, TIME_IMMEDIATE) except it can be called at interrupt level
+ * @return FALSE if the wait would occur occurred otherwise TRUE
+ *
+ * @param[in] psem A pointer to the semaphore
+ * @param[in] ms The maximum time to wait for the semaphore
+ *
+ * @iclass
+ * @api
+ */
+ bool_t gfxSemWaitI(gfxSem *psem);
+
+ /**
* @brief Signal a semaphore
* @details The semaphore counter is increased and if the result is non-positive then a waiting thread
* is queued for execution. Note that once the thread reaches "limit", further signals are