libcryfs/assert/assert.h
2015-10-05 15:46:50 +02:00

41 lines
1.5 KiB
C++

#pragma once
#ifndef MESSMER_CPP_UTILS_ASSERT_ASSERT_H
#define MESSMER_CPP_UTILS_ASSERT_ASSERT_H
/**
* This implements an ASSERT(expr, msg) macro.
* In a debug build, it will crash and halt the program on an assert failure.
* In a release build, it will throw an AssertFailed exception instead, which can then be caught.
*/
#include "AssertFailed.h"
#include <iostream>
#include "backtrace.h"
namespace cpputils {
namespace _assert {
inline std::string format(const char *expr, const char *message, const char *file, int line) {
std::string result = std::string()+"Assertion ["+expr+"] failed in "+file+":"+std::to_string(line)+": "+message+"\n\n" + backtrace();
return result;
}
inline void assert_fail_release [[noreturn]] (const char *expr, const char *message, const char *file, int line) {
throw AssertFailed(format(expr, message, file, line));
}
inline void assert_fail_debug [[noreturn]] (const char *expr, const char *message, const char *file, int line) {
std::cerr << format(expr, message, file, line) << std::endl;
abort();
}
}
}
#ifdef NDEBUG
//TODO Check whether disabling assertions in prod affects speed.
# define ASSERT(expr, msg) (void)((expr) || (cpputils::_assert::assert_fail_release(#expr, msg, __FILE__, __LINE__),0))
#else
# define ASSERT(expr, msg) (void)((expr) || (cpputils::_assert::assert_fail_debug(#expr, msg, __FILE__, __LINE__),0))
#endif
#endif