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- +1 −0 Makefile.ds
- +26 −0 configure.in
- +2 −1 include/SDL.h
- +151 −0 include/SDL_assert.h
- +3 −0 include/SDL_config.h.in
- +3 −0 include/SDL_config_iphoneos.h
- +3 −0 include/SDL_config_macosx.h
- +3 −0 include/SDL_config_minimal.h
- +3 −0 include/SDL_config_nintendods.h
- +3 −0 include/SDL_config_pandora.h
- +3 −0 include/SDL_config_win32.h
- +3 −0 include/SDL_config_wiz.h
- +27 −0 src/SDL.c
- +396 −0 src/SDL_assert.c
- +40 −0 src/video/cocoa/SDL_cocoavideo.m
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/* | ||
SDL - Simple DirectMedia Layer | ||
Copyright (C) 1997-2009 Sam Lantinga | ||
This library is free software; you can redistribute it and/or | ||
modify it under the terms of the GNU Lesser General Public | ||
License as published by the Free Software Foundation; either | ||
version 2.1 of the License, or (at your option) any later version. | ||
This library is distributed in the hope that it will be useful, | ||
but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
Lesser General Public License for more details. | ||
You should have received a copy of the GNU Lesser General Public | ||
License along with this library; if not, write to the Free Software | ||
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | ||
Sam Lantinga | ||
slouken@libsdl.org | ||
*/ | ||
#include "SDL_config.h" | ||
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/* This is an assert macro for SDL's internal use. Not for the public API! */ | ||
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#ifndef _SDL_assert_h | ||
#define _SDL_assert_h | ||
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#ifndef SDL_ASSERT_LEVEL | ||
#error SDL_ASSERT_LEVEL is not defined. Please fix your SDL_config.h. | ||
#endif | ||
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/* | ||
sizeof (x) makes the compiler still parse the expression even without | ||
assertions enabled, so the code is always checked at compile time, but | ||
doesn't actually generate code for it, so there are no side effects or | ||
expensive checks at run time, just the constant size of what x WOULD be, | ||
which presumably gets optimized out as unused. | ||
This also solves the problem of... | ||
int somevalue = blah(); | ||
SDL_assert(somevalue == 1); | ||
...which would cause compiles to complain that somevalue is unused if we | ||
disable assertions. | ||
*/ | ||
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#define SDL_disabled_assert(condition) \ | ||
do { (void) sizeof ((condition)); } while (0) | ||
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#if (SDL_ASSERT_LEVEL > 0) | ||
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/* | ||
These are macros and not first class functions so that the debugger breaks | ||
on the assertion line and not in some random guts of SDL, and so each | ||
macro can have unique static variables associated with it. | ||
*/ | ||
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#if (defined(_MSC_VER) && ((_M_IX86) || (_M_X64))) | ||
#define SDL_TriggerBreakpoint() __asm { int 3 } | ||
#elif (defined(__GNUC__) && ((__i386__) || (__x86_64__))) | ||
#define SDL_TriggerBreakpoint() __asm__ __volatile__ ( "int $3\n\t" ) | ||
#elif defined(unix) | ||
#include <signal.h> | ||
#define SDL_TriggerBreakpoint() raise(SIGTRAP) | ||
#else | ||
#error Please define your platform or set SDL_ASSERT_LEVEL to 0. | ||
#endif | ||
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#if (__STDC_VERSION__ >= 199901L) /* C99 supports __func__ as a standard. */ | ||
# define SDL_FUNCTION __func__ | ||
#elif ((__GNUC__ >= 2) || defined(_MSC_VER)) | ||
# define SDL_FUNCTION __FUNCTION__ | ||
#else | ||
# define SDL_FUNCTION "???" | ||
#endif | ||
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typedef enum | ||
{ | ||
SDL_ASSERTION_RETRY, /**< Retry the assert immediately. */ | ||
SDL_ASSERTION_BREAK, /**< Make the debugger trigger a breakpoint. */ | ||
SDL_ASSERTION_ABORT, /**< Terminate the program. */ | ||
SDL_ASSERTION_IGNORE, /**< Ignore the assert. */ | ||
SDL_ASSERTION_ALWAYS_IGNORE, /**< Ignore the assert from now on. */ | ||
} SDL_assert_state; | ||
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typedef struct SDL_assert_data | ||
{ | ||
int always_ignore; | ||
unsigned int trigger_count; | ||
const char *condition; | ||
const char *filename; | ||
int linenum; | ||
const char *function; | ||
struct SDL_assert_data *next; | ||
} SDL_assert_data; | ||
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SDL_assert_state SDL_ReportAssertion(SDL_assert_data *, const char *, int); | ||
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/* the do {} while(0) avoids dangling else problems: | ||
if (x) SDL_assert(y); else blah(); | ||
... without the do/while, the "else" could attach to this macro's "if". | ||
We try to handle just the minimum we need here in a macro...the loop, | ||
the static vars, and break points. The heavy lifting is handled in | ||
SDL_ReportAssertion(), in SDL_assert.c. | ||
*/ | ||
#define SDL_enabled_assert(condition) \ | ||
do { \ | ||
while ( !(condition) ) { \ | ||
static struct SDL_assert_data assert_data = { \ | ||
0, 0, #condition, __FILE__, 0, 0, 0 \ | ||
}; \ | ||
const SDL_assert_state state = SDL_ReportAssertion(&assert_data, \ | ||
SDL_FUNCTION, \ | ||
__LINE__); \ | ||
if (state == SDL_ASSERTION_RETRY) { \ | ||
continue; /* go again. */ \ | ||
} else if (state == SDL_ASSERTION_BREAK) { \ | ||
SDL_TriggerBreakpoint(); \ | ||
} \ | ||
break; /* not retrying. */ \ | ||
} \ | ||
} while (0) | ||
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#endif /* enabled assertions support code */ | ||
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/* Enable various levels of assertions. */ | ||
#if SDL_ASSERT_LEVEL == 0 /* assertions disabled */ | ||
# define SDL_assert(condition) SDL_disabled_assert(condition) | ||
# define SDL_assert_release(condition) SDL_disabled_assert(condition) | ||
# define SDL_assert_paranoid(condition) SDL_disabled_assert(condition) | ||
#elif SDL_ASSERT_LEVEL == 1 /* release settings. */ | ||
# define SDL_assert(condition) SDL_enabled_assert(condition) | ||
# define SDL_assert_release(condition) SDL_enabled_assert(condition) | ||
# define SDL_assert_paranoid(condition) SDL_enabled_assert(condition) | ||
#elif SDL_ASSERT_LEVEL == 2 /* normal settings. */ | ||
# define SDL_assert(condition) SDL_enabled_assert(condition) | ||
# define SDL_assert_release(condition) SDL_enabled_assert(condition) | ||
# define SDL_assert_paranoid(condition) SDL_disabled_assert(condition) | ||
#elif SDL_ASSERT_LEVEL == 3 /* paranoid settings. */ | ||
# define SDL_assert(condition) SDL_enabled_assert(condition) | ||
# define SDL_assert_release(condition) SDL_enabled_assert(condition) | ||
# define SDL_assert_paranoid(condition) SDL_enabled_assert(condition) | ||
#else | ||
# error Unknown assertion level. Please fix your SDL_config.h. | ||
#endif | ||
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#endif /* _SDL_assert_h */ | ||
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/* vi: set ts=4 sw=4 expandtab: */ | ||
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