RTC_CHECK and RTC_DCHECK macros for C
So that we don't have to use assert(). Includes one sample call site.
NOTRY=true
BUG=chromium:617124
Review-Url: https://codereview.webrtc.org/2262173002
Cr-Commit-Position: refs/heads/master@{#13862}
diff --git a/webrtc/base/checks.h b/webrtc/base/checks.h
index e66c061..a48971f 100644
--- a/webrtc/base/checks.h
+++ b/webrtc/base/checks.h
@@ -11,11 +11,28 @@
#ifndef WEBRTC_BASE_CHECKS_H_
#define WEBRTC_BASE_CHECKS_H_
+#include "webrtc/typedefs.h"
+
+#if (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON))
+#define RTC_DCHECK_IS_ON 1
+#else
+#define RTC_DCHECK_IS_ON 0
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+NO_RETURN void rtc_FatalMessage(const char* file, int line, const char* msg);
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#ifdef __cplusplus
+// C++ version.
+
#include <sstream>
#include <string>
-#include "webrtc/typedefs.h"
-
// The macros here print a message to stderr and abort under various
// conditions. All will accept additional stream messages. For example:
// RTC_DCHECK_EQ(foo, bar) << "I'm printed when foo != bar.";
@@ -163,8 +180,7 @@
// The RTC_DCHECK macro is equivalent to RTC_CHECK except that it only generates
// code in debug builds. It does reference the condition parameter in all cases,
// though, so callers won't risk getting warnings about unused variables.
-#if (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON))
-#define RTC_DCHECK_IS_ON 1
+#if RTC_DCHECK_IS_ON
#define RTC_DCHECK(condition) RTC_CHECK(condition)
#define RTC_DCHECK_EQ(v1, v2) RTC_CHECK_EQ(v1, v2)
#define RTC_DCHECK_NE(v1, v2) RTC_CHECK_NE(v1, v2)
@@ -173,7 +189,6 @@
#define RTC_DCHECK_GE(v1, v2) RTC_CHECK_GE(v1, v2)
#define RTC_DCHECK_GT(v1, v2) RTC_CHECK_GT(v1, v2)
#else
-#define RTC_DCHECK_IS_ON 0
#define RTC_DCHECK(condition) RTC_EAT_STREAM_PARAMETERS(condition)
#define RTC_DCHECK_EQ(v1, v2) RTC_EAT_STREAM_PARAMETERS((v1) == (v2))
#define RTC_DCHECK_NE(v1, v2) RTC_EAT_STREAM_PARAMETERS((v1) != (v2))
@@ -227,4 +242,38 @@
} // namespace rtc
+#else // __cplusplus not defined
+// C version. Lacks many features compared to the C++ version, but usage
+// guidelines are the same.
+
+#define RTC_CHECK(condition) \
+ do { \
+ if (!(condition)) { \
+ rtc_FatalMessage(__FILE__, __LINE__, "CHECK failed: " #condition); \
+ } \
+ } while (0)
+
+#define RTC_CHECK_EQ(a, b) RTC_CHECK((a) == (b))
+#define RTC_CHECK_NE(a, b) RTC_CHECK((a) != (b))
+#define RTC_CHECK_LE(a, b) RTC_CHECK((a) <= (b))
+#define RTC_CHECK_LT(a, b) RTC_CHECK((a) < (b))
+#define RTC_CHECK_GE(a, b) RTC_CHECK((a) >= (b))
+#define RTC_CHECK_GT(a, b) RTC_CHECK((a) > (b))
+
+#define RTC_DCHECK(condition) \
+ do { \
+ if (RTC_DCHECK_IS_ON && !(condition)) { \
+ rtc_FatalMessage(__FILE__, __LINE__, "DCHECK failed: " #condition); \
+ } \
+ } while (0)
+
+#define RTC_DCHECK_EQ(a, b) RTC_DCHECK((a) == (b))
+#define RTC_DCHECK_NE(a, b) RTC_DCHECK((a) != (b))
+#define RTC_DCHECK_LE(a, b) RTC_DCHECK((a) <= (b))
+#define RTC_DCHECK_LT(a, b) RTC_DCHECK((a) < (b))
+#define RTC_DCHECK_GE(a, b) RTC_DCHECK((a) >= (b))
+#define RTC_DCHECK_GT(a, b) RTC_DCHECK((a) > (b))
+
+#endif // __cplusplus
+
#endif // WEBRTC_BASE_CHECKS_H_
