77 lines
2.6 KiB
Groff
77 lines
2.6 KiB
Groff
.TH "evthread_lock_callbacks" 3 "Wed Apr 10 2013" "libevent" \" -*- nroff -*-
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.ad l
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.nh
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.SH NAME
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evthread_lock_callbacks \-
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.PP
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This structure describes the interface a threading library uses for locking\&.
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.SH SYNOPSIS
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.br
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.PP
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.PP
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\fC#include <thread\&.h>\fP
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.SS "Data Fields"
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.in +1c
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.ti -1c
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.RI "void *(* \fBalloc\fP )(unsigned locktype)"
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.br
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.RI "\fIFunction to allocate and initialize new lock of type 'locktype'\&. \fP"
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.ti -1c
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.RI "void(* \fBfree\fP )(void *\fBlock\fP, unsigned locktype)"
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.br
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.RI "\fIFuntion to release all storage held in 'lock', which was created with type 'locktype'\&. \fP"
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.ti -1c
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.RI "int(* \fBlock\fP )(unsigned mode, void *lock)"
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.br
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.RI "\fIAcquire an already-allocated lock at 'lock' with mode 'mode'\&. \fP"
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.ti -1c
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.RI "int \fBlock_api_version\fP"
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.br
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.RI "\fIThe current version of the locking API\&. \fP"
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.ti -1c
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.RI "unsigned \fBsupported_locktypes\fP"
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.br
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.RI "\fIWhich kinds of locks does this version of the locking API support? A bitfield of EVTHREAD_LOCKTYPE_RECURSIVE and EVTHREAD_LOCKTYPE_READWRITE\&. \fP"
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.ti -1c
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.RI "int(* \fBunlock\fP )(unsigned mode, void *\fBlock\fP)"
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.br
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.RI "\fIRelease a lock at 'lock' using mode 'mode'\&. \fP"
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.in -1c
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.SH "Detailed Description"
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.PP
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This structure describes the interface a threading library uses for locking\&.
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It's used to tell \fBevthread_set_lock_callbacks()\fP how to use locking on this platform\&.
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.SH "Field Documentation"
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.PP
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.SS "void*(* evthread_lock_callbacks::alloc)(unsigned locktype)"
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.PP
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Function to allocate and initialize new lock of type 'locktype'\&. Returns NULL on failure\&.
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.SS "void(* evthread_lock_callbacks::free)(void *\fBlock\fP, unsigned locktype)"
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.PP
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Funtion to release all storage held in 'lock', which was created with type 'locktype'\&.
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.SS "int(* evthread_lock_callbacks::lock)(unsigned mode, void *lock)"
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.PP
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Acquire an already-allocated lock at 'lock' with mode 'mode'\&. Returns 0 on success, and nonzero on failure\&.
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.SS "int evthread_lock_callbacks::lock_api_version"
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.PP
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The current version of the locking API\&. Set this to EVTHREAD_LOCK_API_VERSION
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.SS "unsigned evthread_lock_callbacks::supported_locktypes"
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.PP
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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\&.)
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.SS "int(* evthread_lock_callbacks::unlock)(unsigned mode, void *\fBlock\fP)"
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.PP
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Release a lock at 'lock' using mode 'mode'\&. Returns 0 on success, and nonzero on failure\&.
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.SH "Author"
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.PP
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Generated automatically by Doxygen for libevent from the source code\&.
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