Use a log handler to modify abort() behaviour

Be more library friendly, by not aborting in library errors.

spice_common now includes a proper log handler that will abort by
default when reaching a warning.

SPICE_ABORT_LEVEL can be changed to modify run-time abort level.

SPICE_DEBUG_LEVEL can be changed to be more verbose. By default, only
log level more importants than WARNING.

Only memory-related functions are allowed to abort(), since they are
not recoverable errors in the library.

1 files changed, 30 insertions, 0 deletions

diff --git a/common/macros.h b/common/macros.h
new file mode 100644
index 0000000..44a37e4
--- /dev/null
+++ b/common/macros.h
@@ -0,0 +1,30 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/*
+   Copyright (C) 2009 Red Hat, Inc.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __MACROS_H
+#define __MACROS_H
+
+#if    __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
+#define ATTR_PRINTF(a,b)                               \
+    __attribute__((format(printf,a,b)))
+#else
+#define ATTR_PRINTF(a,b)
+#endif /* __GNUC__ */
+
+
+#endif /* __MACROS_H */