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evthread_lock_callbacks(3) Library Functions Manual evthread_lock_callbacks(3) NAME evthread_lock_callbacks - This structure describes the interface a threading library uses for locking. SYNOPSIS #include <thread.h> Data Fields void *(* alloc )(unsigned locktype) Function to allocate and initialize new lock of type 'locktype'. void(* free )(void *lock, unsigned locktype) Funtion to release all storage held in 'lock', which was created with type 'locktype'. int(* lock )(unsigned mode, void *lock) Acquire an already-allocated lock at 'lock' with mode 'mode'. int lock_api_version The current version of the locking API. unsigned supported_locktypes Which kinds of locks does this version of the locking API support? A bitfield of EVTHREAD_LOCKTYPE_RECURSIVE and EVTHREAD_LOCKTYPE_READWRITE. int(* unlock )(unsigned mode, void *lock) Release a lock at 'lock' using mode 'mode'. Detailed Description This structure describes the interface a threading library uses for locking. It's used to tell evthread_set_lock_callbacks() how to use locking on this platform. Field Documentation void*(* evthread_lock_callbacks::alloc)(unsigned locktype) Function to allocate and initialize new lock of type 'locktype'. Returns NULL on failure. void(* evthread_lock_callbacks::free)(void *lock, unsigned locktype) Funtion to release all storage held in 'lock', which was created with type 'locktype'. int(* evthread_lock_callbacks::lock)(unsigned mode, void *lock) Acquire an already-allocated lock at 'lock' with mode 'mode'. Returns 0 on success, and nonzero on failure. int evthread_lock_callbacks::lock_api_version The current version of the locking API. Set this to EVTHREAD_LOCK_API_VERSION unsigned evthread_lock_callbacks::supported_locktypes Which kinds of locks does this version of the locking API support? A bitfield of EVTHREAD_LOCKTYPE_RECURSIVE and EVTHREAD_LOCKTYPE_READWRITE. (Note that RECURSIVE locks are currently mandatory, and READWRITE locks are not currently used.) int(* evthread_lock_callbacks::unlock)(unsigned mode, void *lock) Release a lock at 'lock' using mode 'mode'. Returns 0 on success, and nonzero on failure. Author Generated automatically by Doxygen for libevent from the source code. libevent Tue Jan 27 2015 evthread_lock_callbacks(3)