1 files changed, 72 insertions, 0 deletions
diff --git a/src/log.c b/src/log.c
new file mode 100644
index 0000000..bba5ba6
--- /dev/null
+++ b/src/log.c
@@ -0,0 +1,72 @@
+/*
+ * Copyright 2019-2021 OARC, Inc.
+ * Copyright 2017-2018 Akamai Technologies
+ * Copyright 2006-2016 Nominum, Inc.
+ * All rights reserved.
+ *
+ * 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.
+ */
+
+#include "config.h"
+
+#include "log.h"
+
+#include "util.h"
+
+#include <pthread.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static bool log_err_stdout = false;
+
+pthread_mutex_t log_lock = PTHREAD_MUTEX_INITIALIZER;
+
+static void
+vlog(FILE* stream, const char* prefix, const char* fmt, va_list args)
+{
+    PERF_LOCK(&log_lock);
+    fflush(stdout);
+    if (prefix != NULL)
+        fprintf(stream, "%s: ", prefix);
+    vfprintf(stream, fmt, args);
+    fprintf(stream, "\n");
+    PERF_UNLOCK(&log_lock);
+}
+
+void perf_log_printf(const char* fmt, ...)
+{
+    va_list args;
+    va_start(args, fmt);
+    vlog(stdout, NULL, fmt, args);
+}
+
+void perf_log_fatal(const char* fmt, ...)
+{
+    va_list args;
+    va_start(args, fmt);
+    vlog(log_err_stdout ? stdout : stderr, "Error", fmt, args);
+    exit(1);
+}
+
+void perf_log_warning(const char* fmt, ...)
+{
+    va_list args;
+    va_start(args, fmt);
+    vlog(log_err_stdout ? stdout : stderr, "Warning", fmt, args);
+}
+
+void perf_log_tostdout(void)
+{
+    log_err_stdout = true;
+}