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#ifndef _ASSERT_H
#define _ASSERT_H
/** @file
*
* Assertions
*
* This file provides two assertion macros: assert() (for run-time
* assertions) and linker_assert() (for link-time assertions).
*
*/
FILE_LICENCE ( GPL2_OR_LATER );
#ifdef NDEBUG
#define ASSERTING 0
#else
#define ASSERTING 1
#endif
extern unsigned int assertion_failures;
#define ASSERTED ( ASSERTING && ( assertion_failures != 0 ) )
/** printf() for assertions
*
* This function exists so that the assert() macro can expand to
* printf() calls without dragging the printf() prototype into scope.
*
* As far as the compiler is concerned, assert_printf() and printf() are
* completely unrelated calls; it's only at the assembly stage that
* references to the assert_printf symbol are collapsed into references
* to the printf symbol.
*/
extern int __attribute__ (( format ( printf, 1, 2 ) ))
assert_printf ( const char *fmt, ... ) asm ( "printf" );
/**
* Assert a condition at run-time.
*
* If the condition is not true, a debug message will be printed.
* Assertions only take effect in debug-enabled builds (see DBG()).
*
* @todo Make an assertion failure abort the program
*
*/
#define assert( condition ) \
do { \
if ( ASSERTING && ! (condition) ) { \
assertion_failures++; \
assert_printf ( "assert(%s) failed at %s line %d\n", \
#condition, __FILE__, __LINE__ ); \
} \
} while ( 0 )
/**
* Assert a condition at link-time.
*
* If the condition is not true, the link will fail with an unresolved
* symbol (error_symbol).
*
* This macro is iPXE-specific. Do not use this macro in code
* intended to be portable.
*
*/
#define linker_assert( condition, error_symbol ) \
if ( ! (condition) ) { \
extern void error_symbol ( void ); \
error_symbol(); \
}
#endif /* _ASSERT_H */
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