1 files changed, 45 insertions, 0 deletions
diff --git a/sigchainlib/log.h b/sigchainlib/log.h
new file mode 100644
index 00000000000..d689930c1e9
--- /dev/null
+++ b/sigchainlib/log.h
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_SIGCHAINLIB_LOG_H_
+#define ART_SIGCHAINLIB_LOG_H_
+
+#if defined(__ANDROID__)
+
+#include <async_safe/log.h>
+
+#define log(...) async_safe_format_log(ANDROID_LOG_ERROR, "libsigchain", __VA_ARGS__)
+#define fatal async_safe_fatal
+
+#else
+
+#include <stdarg.h>
+#include <stdio.h>
+
+static void log(const char* format, ...) {
+  va_list ap;
+  va_start(ap, format);
+  vprintf(format, ap);
+  va_end(ap);
+
+  printf("\n");
+}
+
+#define fatal(...) log(__VA_ARGS__); abort()
+
+#endif
+
+#endif  // ART_SIGCHAINLIB_LOG_H_