PublicUtility/CAXException.h
/* |
Copyright (C) 2016 Apple Inc. All Rights Reserved. |
See LICENSE.txt for this sample’s licensing information |
Abstract: |
Part of CoreAudio Utility Classes |
*/ |
#ifndef __CAXException_h__ |
#define __CAXException_h__ |
#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__) |
#include <CoreFoundation/CoreFoundation.h> |
#else |
#include <ConditionalMacros.h> |
#include <CoreFoundation.h> |
#endif |
#include "CADebugMacros.h" |
#include <ctype.h> |
//#include <stdio.h> |
#include <string.h> |
class CAX4CCString { |
public: |
CAX4CCString(OSStatus error) { |
// see if it appears to be a 4-char-code |
char *str = mStr; |
*(UInt32 *)(str + 1) = CFSwapInt32HostToBig(error); |
if (isprint(str[1]) && isprint(str[2]) && isprint(str[3]) && isprint(str[4])) { |
str[0] = str[5] = '\''; |
str[6] = '\0'; |
} else if (error > -200000 && error < 200000) |
// no, format it as an integer |
sprintf(str, "%d", (int)error); |
else |
sprintf(str, "0x%x", (int)error); |
} |
const char *get() const { return mStr; } |
operator const char *() const { return mStr; } |
private: |
char mStr[16]; |
}; |
// An extended exception class that includes the name of the failed operation |
class CAXException { |
public: |
CAXException(const char *operation, OSStatus err) : |
mError(err) |
{ |
if (operation == NULL) |
mOperation[0] = '\0'; |
else if (strlen(operation) >= sizeof(mOperation)) { |
memcpy(mOperation, operation, sizeof(mOperation) - 1); |
mOperation[sizeof(mOperation) - 1] = '\0'; |
} else |
strlcpy(mOperation, operation, sizeof(mOperation)); |
} |
char *FormatError(char *str) const |
{ |
return FormatError(str, mError); |
} |
char mOperation[256]; |
const OSStatus mError; |
// ------------------------------------------------- |
typedef void (*WarningHandler)(const char *msg, OSStatus err); |
static char *FormatError(char *str, OSStatus error) |
{ |
strcpy(str, CAX4CCString(error)); |
return str; |
} |
static void Warning(const char *s, OSStatus error) |
{ |
if (sWarningHandler) |
(*sWarningHandler)(s, error); |
} |
static void SetWarningHandler(WarningHandler f) { sWarningHandler = f; } |
private: |
static WarningHandler sWarningHandler; |
}; |
#if DEBUG || CoreAudio_Debug |
#define XThrowIfError(error, operation) \ |
do { \ |
OSStatus __err = error; \ |
if (__err) { \ |
DebugMessageN2("about to throw %s: %s", CAX4CCString(__err).get(), operation);\ |
__THROW_STOP; \ |
throw CAXException(operation, __err); \ |
} \ |
} while (0) |
#define XThrowIf(condition, error, operation) \ |
do { \ |
if (condition) { \ |
OSStatus __err = error; \ |
DebugMessageN2("about to throw %s: %s", CAX4CCString(__err).get(), operation);\ |
__THROW_STOP; \ |
throw CAXException(operation, __err); \ |
} \ |
} while (0) |
#define XRequireNoError(error, label) \ |
do { \ |
OSStatus __err = error; \ |
if (__err) { \ |
DebugMessageN2("about to throw %s: %s", CAX4CCString(__err).get(), #error);\ |
STOP; \ |
goto label; \ |
} \ |
} while (0) |
#define XAssert(assertion) \ |
do { \ |
if (!(assertion)) { \ |
DebugMessageN3("[%s, %d] error: failed assertion: %s", __FILE__, __LINE__, #assertion); \ |
__ASSERT_STOP; \ |
} \ |
} while (0) |
#define XAssertNoError(error) \ |
do { \ |
OSStatus __err = error; \ |
if (__err) { \ |
DebugMessageN2("error %s: %s", CAX4CCString(__err).get(), #error);\ |
STOP; \ |
} \ |
} while (0) |
#define ca_require_noerr(errorCode, exceptionLabel) \ |
do \ |
{ \ |
int evalOnceErrorCode = (errorCode); \ |
if ( __builtin_expect(0 != evalOnceErrorCode, 0) ) \ |
{ \ |
DebugMessageN5("ca_require_noerr: [%s, %d] (goto %s;) %s:%d", \ |
#errorCode, evalOnceErrorCode, \ |
#exceptionLabel, \ |
__FILE__, \ |
__LINE__); \ |
goto exceptionLabel; \ |
} \ |
} while ( 0 ) |
#define ca_verify_noerr(errorCode) \ |
do \ |
{ \ |
int evalOnceErrorCode = (errorCode); \ |
if ( __builtin_expect(0 != evalOnceErrorCode, 0) ) \ |
{ \ |
DebugMessageN4("ca_verify_noerr: [%s, %d] %s:%d", \ |
#errorCode, evalOnceErrorCode, \ |
__FILE__, \ |
__LINE__); \ |
} \ |
} while ( 0 ) |
#define ca_debug_string(message) \ |
do \ |
{ \ |
DebugMessageN3("ca_debug_string: %s %s:%d", \ |
message, \ |
__FILE__, \ |
__LINE__); \ |
} while ( 0 ) |
#define ca_verify(assertion) \ |
do \ |
{ \ |
if ( __builtin_expect(!(assertion), 0) ) \ |
{ \ |
DebugMessageN3("ca_verify: %s %s:%d", \ |
#assertion, \ |
__FILE__, \ |
__LINE__); \ |
} \ |
} while ( 0 ) |
#define ca_require(assertion, exceptionLabel) \ |
do \ |
{ \ |
if ( __builtin_expect(!(assertion), 0) ) \ |
{ \ |
DebugMessageN4("ca_require: %s %s %s:%d", \ |
#assertion, \ |
#exceptionLabel, \ |
__FILE__, \ |
__LINE__); \ |
goto exceptionLabel; \ |
} \ |
} while ( 0 ) |
#define ca_check(assertion) \ |
do \ |
{ \ |
if ( __builtin_expect(!(assertion), 0) ) \ |
{ \ |
DebugMessageN3("ca_check: %s %s:%d", \ |
#assertion, \ |
__FILE__, \ |
__LINE__); \ |
} \ |
} while ( 0 ) |
#else |
#define XThrowIfError(error, operation) \ |
do { \ |
OSStatus __err = error; \ |
if (__err) { \ |
throw CAXException(operation, __err); \ |
} \ |
} while (0) |
#define XThrowIf(condition, error, operation) \ |
do { \ |
if (condition) { \ |
OSStatus __err = error; \ |
throw CAXException(operation, __err); \ |
} \ |
} while (0) |
#define XRequireNoError(error, label) \ |
do { \ |
OSStatus __err = error; \ |
if (__err) { \ |
goto label; \ |
} \ |
} while (0) |
#define XAssert(assertion) \ |
do { \ |
if (!(assertion)) { \ |
} \ |
} while (0) |
#define XAssertNoError(error) \ |
do { \ |
/*OSStatus __err =*/ error; \ |
} while (0) |
#define ca_require_noerr(errorCode, exceptionLabel) \ |
do \ |
{ \ |
if ( __builtin_expect(0 != (errorCode), 0) ) \ |
{ \ |
goto exceptionLabel; \ |
} \ |
} while ( 0 ) |
#define ca_verify_noerr(errorCode) \ |
do \ |
{ \ |
if ( 0 != (errorCode) ) \ |
{ \ |
} \ |
} while ( 0 ) |
#define ca_debug_string(message) |
#define ca_verify(assertion) \ |
do \ |
{ \ |
if ( !(assertion) ) \ |
{ \ |
} \ |
} while ( 0 ) |
#define ca_require(assertion, exceptionLabel) \ |
do \ |
{ \ |
if ( __builtin_expect(!(assertion), 0) ) \ |
{ \ |
goto exceptionLabel; \ |
} \ |
} while ( 0 ) |
#define ca_check(assertion) \ |
do \ |
{ \ |
if ( !(assertion) ) \ |
{ \ |
} \ |
} while ( 0 ) |
#endif |
#define XThrow(error, operation) XThrowIf(true, error, operation) |
#define XThrowIfErr(error) XThrowIfError(error, #error) |
#endif // __CAXException_h__ |
Copyright © 2016 Apple Inc. All Rights Reserved. Terms of Use | Privacy Policy | Updated: 2016-08-12