50 lines
1.9 KiB
C++
50 lines
1.9 KiB
C++
#pragma once
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#ifndef MESSMER_CPP_UTILS_ASSERT_ASSERT_H
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#define MESSMER_CPP_UTILS_ASSERT_ASSERT_H
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/**
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* This implements an ASSERT(expr, msg) macro.
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* In a debug build, it will crash and halt the program on an assert failure.
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* In a release build, it will throw an AssertFailed exception instead, which can then be caught.
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*/
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#include "AssertFailed.h"
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#include <iostream>
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#include <string>
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#include <execinfo.h>
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namespace cpputils {
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namespace _assert {
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inline std::string format(const char *expr, const char *message, const char *file, int line) {
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// get void*'s for all entries on the stack
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void *array[10];
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size_t size = backtrace(array, sizeof(array));
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char **backtrace_str = backtrace_symbols(array, sizeof(backtrace_str));
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std::string result = std::string()+"Assertion ["+expr+"] failed in "+file+":"+std::to_string(line)+": "+message+"\n\n";
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for (unsigned int i = 0; i < size; ++i) {
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result += std::string(backtrace_str[i]) + "\n";
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}
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free(backtrace_str);
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return result;
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}
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inline void assert_fail_release [[noreturn]] (const char *expr, const char *message, const char *file, int line) {
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throw AssertFailed(format(expr, message, file, line));
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}
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inline void assert_fail_debug [[noreturn]] (const char *expr, const char *message, const char *file, int line) {
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std::cerr << format(expr, message, file, line) << std::endl;
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abort();
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}
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}
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}
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#ifdef NDEBUG
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//TODO Check whether disabling assertions in prod affects speed.
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# define ASSERT(expr, msg) (void)((expr) || (cpputils::_assert::assert_fail_release(#expr, msg, __FILE__, __LINE__),0))
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#else
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# define ASSERT(expr, msg) (void)((expr) || (cpputils::_assert::assert_fail_debug(#expr, msg, __FILE__, __LINE__),0))
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#endif
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#endif
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