1 files changed, 94 insertions, 0 deletions
diff --git a/src/core/lib/gpr/log.cc b/src/core/lib/gpr/log.cc
new file mode 100644
index 0000000000..19c0f6c34d
--- /dev/null
+++ b/src/core/lib/gpr/log.cc
@@ -0,0 +1,94 @@
+/*
+ *
+ * Copyright 2015 gRPC authors.
+ *
+ * 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 <grpc/support/alloc.h>
+#include <grpc/support/atm.h>
+#include <grpc/support/log.h>
+#include <grpc/support/port_platform.h>
+
+#include "src/core/lib/gpr/env.h"
+#include "src/core/lib/gpr/string.h"
+
+#include <stdio.h>
+#include <string.h>
+
+void gpr_default_log(gpr_log_func_args* args);
+static gpr_atm g_log_func = (gpr_atm)gpr_default_log;
+static gpr_atm g_min_severity_to_print = GPR_LOG_VERBOSITY_UNSET;
+
+const char* gpr_log_severity_string(gpr_log_severity severity) {
+  switch (severity) {
+    case GPR_LOG_SEVERITY_DEBUG:
+      return "D";
+    case GPR_LOG_SEVERITY_INFO:
+      return "I";
+    case GPR_LOG_SEVERITY_ERROR:
+      return "E";
+  }
+  GPR_UNREACHABLE_CODE(return "UNKNOWN");
+}
+
+void gpr_log_message(const char* file, int line, gpr_log_severity severity,
+                     const char* message) {
+  if ((gpr_atm)severity < gpr_atm_no_barrier_load(&g_min_severity_to_print)) {
+    return;
+  }
+
+  gpr_log_func_args lfargs;
+  memset(&lfargs, 0, sizeof(lfargs));
+  lfargs.file = file;
+  lfargs.line = line;
+  lfargs.severity = severity;
+  lfargs.message = message;
+  ((gpr_log_func)gpr_atm_no_barrier_load(&g_log_func))(&lfargs);
+}
+
+void gpr_set_log_verbosity(gpr_log_severity min_severity_to_print) {
+  gpr_atm_no_barrier_store(&g_min_severity_to_print,
+                           (gpr_atm)min_severity_to_print);
+}
+
+void gpr_log_verbosity_init() {
+  char* verbosity = nullptr;
+  const char* insecure_getenv = gpr_getenv_silent("GRPC_VERBOSITY", &verbosity);
+
+  gpr_atm min_severity_to_print = GPR_LOG_SEVERITY_ERROR;
+  if (verbosity != nullptr) {
+    if (gpr_stricmp(verbosity, "DEBUG") == 0) {
+      min_severity_to_print = (gpr_atm)GPR_LOG_SEVERITY_DEBUG;
+    } else if (gpr_stricmp(verbosity, "INFO") == 0) {
+      min_severity_to_print = (gpr_atm)GPR_LOG_SEVERITY_INFO;
+    } else if (gpr_stricmp(verbosity, "ERROR") == 0) {
+      min_severity_to_print = (gpr_atm)GPR_LOG_SEVERITY_ERROR;
+    }
+    gpr_free(verbosity);
+  }
+  if ((gpr_atm_no_barrier_load(&g_min_severity_to_print)) ==
+      GPR_LOG_VERBOSITY_UNSET) {
+    gpr_atm_no_barrier_store(&g_min_severity_to_print, min_severity_to_print);
+  }
+
+  if (insecure_getenv != nullptr) {
+    gpr_log(GPR_DEBUG, "Warning: insecure environment read function '%s' used",
+            insecure_getenv);
+  }
+}
+
+void gpr_set_log_function(gpr_log_func f) {
+  gpr_atm_no_barrier_store(&g_log_func, (gpr_atm)(f ? f : gpr_default_log));
+}