diff options
Diffstat (limited to 'misc/thread_tools.h')
| -rw-r--r-- | misc/thread_tools.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/misc/thread_tools.h b/misc/thread_tools.h index a734ac85b0..2198181e6c 100644 --- a/misc/thread_tools.h +++ b/misc/thread_tools.h @@ -59,6 +59,23 @@ bool mp_cancel_wait(struct mp_cancel *c, double timeout); // Restore original state. (Allows reusing a mp_cancel.) void mp_cancel_reset(struct mp_cancel *c); +// Add a callback to invoke when mp_cancel gets triggered. If it's already +// triggered, call it from mp_cancel_add_cb() directly. May be called multiple +// times even if the trigger state changes; not called if it resets. In all +// cases, this may be called with internal locks held (either in mp_cancel, or +// other locks held by whoever calls mp_cancel_trigger()). +// There is only one callback. Create a slave mp_cancel to get a private one. +void mp_cancel_set_cb(struct mp_cancel *c, void (*cb)(void *ctx), void *ctx); + +// If c gets triggered, automatically trigger slave. Trying to add a slave more +// than once or to multiple parents is undefined behavior. +// The parent mp_cancel must remain valid until the slave is manually removed +// or destroyed. Destroying a mp_cancel that still has slaves is an error. +void mp_cancel_add_slave(struct mp_cancel *c, struct mp_cancel *slave); + +// Undo mp_cancel_add_slave(). Ignores never added slaves for easier cleanup. +void mp_cancel_remove_slave(struct mp_cancel *c, struct mp_cancel *slave); + // win32 "Event" HANDLE that indicates the current mp_cancel state. void *mp_cancel_get_event(struct mp_cancel *c); |