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-rw-r--r--doc/src/snippets/code/src_corelib_thread_qsemaphore.cpp33
1 files changed, 33 insertions, 0 deletions
diff --git a/doc/src/snippets/code/src_corelib_thread_qsemaphore.cpp b/doc/src/snippets/code/src_corelib_thread_qsemaphore.cpp
new file mode 100644
index 0000000..e02f05e
--- /dev/null
+++ b/doc/src/snippets/code/src_corelib_thread_qsemaphore.cpp
@@ -0,0 +1,33 @@
+//! [0]
+QSemaphore sem(5); // sem.available() == 5
+
+sem.acquire(3); // sem.available() == 2
+sem.acquire(2); // sem.available() == 0
+sem.release(5); // sem.available() == 5
+sem.release(5); // sem.available() == 10
+
+sem.tryAcquire(1); // sem.available() == 9, returns true
+sem.tryAcquire(250); // sem.available() == 9, returns false
+//! [0]
+
+
+//! [1]
+QSemaphore sem(5); // a semaphore that guards 5 resources
+sem.acquire(5); // acquire all 5 resources
+sem.release(5); // release the 5 resources
+sem.release(10); // "create" 10 new resources
+//! [1]
+
+
+//! [2]
+QSemaphore sem(5); // sem.available() == 5
+sem.tryAcquire(250); // sem.available() == 5, returns false
+sem.tryAcquire(3); // sem.available() == 2, returns true
+//! [2]
+
+
+//! [3]
+QSemaphore sem(5); // sem.available() == 5
+sem.tryAcquire(250, 1000); // sem.available() == 5, waits 1000 milliseconds and returns false
+sem.tryAcquire(3, 30000); // sem.available() == 2, returns true without waiting
+//! [3]