Commit header with three macros that help with signal handling. Will be actually

used later. Now, all new files are in.


git-svn-id: https://svn.xiph.org/trunk/ezstream@12541 0101bb08-14d6-0310-b084-bc0e0c8e3800

src/ezsignals.h

@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2007 Moritz Grimm <gtgbr@gmx.net>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* Macros to install, suspend and restore signals */
+
+#ifndef __EZSIGNALS_H__
+#define __EZSIGNALS_H__
+
+#define SIGS_INSTALL(a, b)	do {					\
+	unsigned int i; 						\
+	for (i = 0; i < sizeof(a) / sizeof(int); i++) { 		\
+		if (sigaction((a)[i], (b), NULL) == -1) {		\
+			printf("%s: sigaction(): %s\n", 		\
+			       __progname, strerror(errno));		\
+			return (1);					\
+		}							\
+	}								\
+} while (0);
+
+#define SIGS_SUSPEND(a, b)	do {					\
+	unsigned int	i;						\
+	sigset_t	sigset; 					\
+	sigemptyset(&sigset);						\
+	for (i = 0; i < sizeof(a) / sizeof(int); i++) { 		\
+		if (sigaddset(&sigset, (a)[i]) == -1)			\
+			printf("%s: sigaddset(): %s\n", 		\
+			       __progname, strerror(errno));		\
+			exit(1);					\
+	}								\
+	if (sigprocmask(SIG_BLOCK, &sigset, (b)) == -1) {		\
+		printf("%s: sigprocmask(): %s\n", __progname,		\
+		       strerror(errno));				\
+		exit(1);						\
+	}								\
+} while (0);
+
+#define SIGS_RESTORE(a) 	do {					\
+	if (sigprocmask(SIG_SETMASK, (a), NULL) == -1) {		\
+		printf("%s: sigprocmask(): %s\n", __progname,		\
+		       strerror(errno));				\
+		exit(1);						\
+	}								\
+} while (0);
+
+#endif /* __EZSIGNALS_H__ */