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.\" ========================================================================
.\"
.IX Title "xpaoom n"
.TH xpaoom n "June 7, 2012" "version 2.1.14" "SAORD Documentation"
.SH "NAME"
\&\fBXpaoom: What happens when XPA runs out of memory?\fR
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
When \s-1XPA\s0 can't allocate memory, it exits. You can arrange to have it call
\&\fIlongjmp()\fR instead.
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
When an \s-1XPA\s0 server or client cannot allocate memory, it will attempt to
output an error message and then exit. If this is not satisfactory (e.g.,
perhaps your program is interactive and can recover from \s-1OOM\s0 errors), you
can tell \s-1XPA\s0 to call \fIlongjmp()\fR to go to a recovery branch. To pass the 
requisite jmp_buf variable to \s-1XPA\s0, make the following call:
.PP
.Vb 1
\&  XPASaveJmp(void *env);
.Ve
.PP
The value of env is the address of a jmp_buf variable that was previously 
passed to \fIsetjmp()\fR. For example:
.PP
.Vb 9
\&  jmp_buf env;
\&  ...
\&  if( setjmp(jmp_buf) != 0 ){
\&    /* out of memory -- take corrective action, if possible */
\&  } else {
\&    /* save env for XPA */
\&    XPASaveJmp((void *)&jmp_buf);
\&  }
\&  // enter main loop ...
.Ve
.SH "SEE ALSO"
.IX Header "SEE ALSO"
See xpa(n) for a list of \s-1XPA\s0 help pages
