clients & tests: Unify multiple definitions of x*alloc and related functions

Direct fail_on_null calls now produce output like:

    [weston-info] clients/weston-info.c:714: out of memory

xmalloc, et al produce output on failure like:

    [weston-info] out of memory (-1)

Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>

shared/xalloc.c

@@ -0,0 +1,54 @@
+/*
+ * Copyright © 2008 Kristian Høgsberg
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "config.h"
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "xalloc.h"
+
+void *
+fail_on_null(void *p, size_t size, char *file, int32_t line)
+{
+	if (p == NULL) {
+		fprintf(stderr, "[%s] ", program_invocation_short_name);
+		if (file)
+			fprintf(stderr, "%s:%d: ", file, line);
+		fprintf(stderr, "out of memory");
+		if (size)
+			fprintf(stderr, " (%zd)", size);
+		fprintf(stderr, "\n");
+		exit(EXIT_FAILURE);
+	}
+
+	return p;
+}
+
+
+#ifdef  __cplusplus
+}
+#endif

shared/xalloc.h

@@ -0,0 +1,70 @@
+/*
+ * Copyright © 2008 Kristian Høgsberg
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef WESTON_XALLOC_H
+#define WESTON_XALLOC_H
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "zalloc.h"
+
+void *
+fail_on_null(void *p, size_t size, char *file, int32_t line);
+
+static inline void *
+xmalloc(size_t s)
+{
+	return fail_on_null(malloc(s), s, NULL, 0);
+}
+
+static inline void *
+xzalloc(size_t s)
+{
+	return fail_on_null(zalloc(s), s, NULL, 0);
+}
+
+static inline char *
+xstrdup(const char *s)
+{
+	return fail_on_null(strdup(s), 0, NULL, 0);
+}
+
+static inline void *
+xrealloc(char *p, size_t s)
+{
+	return fail_on_null(realloc(p, s), s, NULL, 0);
+}
+
+
+#ifdef  __cplusplus
+}
+#endif
+
+#endif /* WESTON_XALLOC_H */