Cnd_signal
cnd_signal is a C threads-library function that wakes one thread waiting on a condition variable.
Modern C, Third Edition
cnd_signal is a C threads-library function that wakes one thread waiting on a condition variable.
- How it is used
- Coordinates producer-and-consumer-style thread progress by waking one waiter after protected shared-state changes.
- How deep it goes
- Explains wakeup behavior, condition loops, mutex coupling, and mutex-mediated synchronization, but not implementation internals.
- Examples
- Demonstrates account, update, and draw threads signaling condition variables while coordinating shared game state.
- What you can do after
- Operate/configure it to wake one correctly synchronized waiter without assuming that waking proves the condition.
Modern C
cnd_signal is a C11 condition-variable function that wakes one thread waiting on a condition variable.
- How it is used
- Coordinates worker threads by notifying one waiter that shared-state work may now be available.
- How deep it goes
- Explains single-waiter wake-up and guarded rechecking, while deferring broader condition-variable implementation details.
- Examples
- Uses account, update, and draw threads that signal one another after protected work completes.
- What you can do after
- Apply via cnd_signal to notify one condition-variable waiter while preserving a loop that validates the shared condition.
Related concepts
- condition variableuses · A condition variable is a synchronization object that allows threads to wait for a shared-state condition and be notified when it may have changed.
- lockinguses · Locking is a synchronization technique that restricts concurrent access to shared resources or protected operations.
- cnd_broadcastcontrasts with · cnd_broadcast is a C threads-library function that wakes all threads waiting on a condition variable.
- cnd_tuses · cnd_t is a C threads-library type representing a condition-variable object used for thread waiting and notification.
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