wyonce.3wy

一个不错

.\"
.\" Edited by I.J.Wang, 2004
.\"
.TH WyOnce 3wy "libwy v0.31"
.SH NAME
WyOnce \- class of once variable
.SH SYNOPSIS
.B #include <wyonce.h>
.PP
WyOnce is the discardable class that ensures a given function is called at most once.
.SH "PUBLIC MEMBERS"
 \fBWyOnce\fP() throw()
 \fBWyOnce\fP( void(*)(void) )
 bool \fBis_default\fP(void) const throw()
 void \fBonce\fP( void(*)(void) )
.SH "DESCRIPTION"
.\"--------------------------------------------
.PP
.BI "WyOnce() throw()"
.PP
    Construct default object
    (object has never been used to call the ensured once function)
.\"--------------------------------------------
.PP
.BI "WyOnce( void(*" "once_func" ")(void) )"
.PP
    Construct object, then call \fIonce_func\fP immediately.
.PP
    [\fBThrow\fP] (Reserved)
.PP 
    [\fBRefer\fP] ::pthread_once
.\"--------------------------------------------
.PP
.BI "bool is_default(void) const throw()"
.TP
    Is *this equivalent to the default object
.PP
    [\fBRet\fP] true= object is equivalent to WyOnce(). (object has never
                been used to call the ensured once function)
         false= otherwise
.\"--------------------------------------------
.PP
.BI "void once( void(*" "once_func" ")(void) )" 
.PP
    Call \fIonce_func()\fP and make object non-default. If object is
    already non-defaut, this function has no effect.
.PP
    [\fBThrow\fP] (Reserved)
.PP 
    [\fBRefer\fP] ::pthread_once
.\"--------------------------------------------
.SH "SEE ALSO"
.BR wyreply
.BR wyret
.BR wymutex
.BR wylock
.BR wytimespec
.BR wy_thread
.SH NOTE
Except added by this library, replys are converted from the errno 
an underlying C library function returned. Report of such replys
are brief from Linux Programmer's Manual. See the associated man page
for details.

Project is in development, http://sourceforge.net/projects/libwx