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authordos-reis <gdr@axiomatics.org>2007-08-14 05:14:52 +0000
committerdos-reis <gdr@axiomatics.org>2007-08-14 05:14:52 +0000
commitab8cc85adde879fb963c94d15675783f2cf4b183 (patch)
treec202482327f474583b750b2c45dedfc4e4312b1d /src/graph/viewman/sselect.c.pamphlet
downloadopen-axiom-ab8cc85adde879fb963c94d15675783f2cf4b183.tar.gz
Initial population.
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+\documentclass{article}
+\usepackage{axiom}
+\begin{document}
+\title{\$SPAD/src/graph/viewman sselect.c}
+\author{The Axiom Team}
+\maketitle
+\begin{abstract}
+\end{abstract}
+\eject
+\tableofcontents
+\eject
+\section{License}
+<<license>>=
+/*
+Copyright (c) 1991-2002, The Numerical ALgorithms Group Ltd.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+ - Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ - Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in
+ the documentation and/or other materials provided with the
+ distribution.
+
+ - Neither the name of The Numerical ALgorithms Group Ltd. nor the
+ names of its contributors may be used to endorse or promote products
+ derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+@
+<<*>>=
+<<license>>
+
+#define _SSELECT_C
+#include "axiom-c-macros.h"
+#include "useproto.h"
+
+#include <stdio.h>
+#include <errno.h>
+#include <sys/time.h>
+#include <sys/wait.h>
+#include <signal.h>
+
+#include "viewman.h"
+#include "bsdsignal.h"
+
+#include "sockio-c.H1"
+#include "bsdsignal.H1"
+#include "cleanup.H1"
+#include "sselect.H1"
+
+/*******************************************
+ * int superSelect(n, rd, wr, ex, timeout) *
+ * *
+ * superselect! if select returns a -1 *
+ * due to an interrupt (EINTR), this *
+ * routine checks to see if it's a *
+ * child viewport that has closed. *
+ * Expected global variables: *
+ * int checkClosedChild *
+ *******************************************/
+
+int
+#ifdef _NO_PROTO
+superSelect(n, rd, wr, ex, timeout)
+ int n;
+ int *rd, *wr, *ex;
+ char *timeout;
+#else
+superSelect(int n, int *rd, int *wr, int *ex, char *timeout)
+#endif
+{
+
+ int waiting;
+ viewManager *viewport;
+ int ret_val;
+
+ ret_val = select(n, (void *)rd, (void *)wr, (void *)ex, (void *)timeout);
+ while (ret_val == -1 && errno == EINTR) {
+ /* checkClosedChild gets set by the SIGCHLD handler */
+ if (checkClosedChild) {
+ while ((waiting = wait(0)) == -1 );
+ viewport = viewports;
+ while ((viewport) && (viewport->PID != waiting))
+ viewport = viewport->nextViewport;
+ if (viewport) {
+ /* we shouldn't really be doing this since child is dead */
+ /* rmViewMgr(viewport); */
+ /* flush(spadSock); */
+ /* send_int(spadSock,1); acknowledge to spad */
+ checkClosedChild = no;
+#if defined(BSDplatform) || defined(MACOSXplatform)
+ bsdSignal(SIGCHLD,endChild,DontRestartSystemCalls);
+#else
+ bsdSignal(SIGCLD,endChild,DontRestartSystemCalls);
+#endif
+ }
+ }
+ ret_val = select(n, (void *)rd, (void *)wr, (void *)ex, (void *)timeout);
+ }
+ return ret_val;
+}
+@
+\eject
+\begin{thebibliography}{99}
+\bibitem{1} nothing
+\end{thebibliography}
+\end{document}