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Move the CTASSERT macro from MD code to systm.h alongside KASSERT so other

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code can use it.  This takes a single constant argument and fails to compile
if it is 0 (false).  The main application of this is to make assertions about
structure sizes at compile time, in order to validate assumptions made in
other code.  Examples:

CTASSERT(sizeof(struct foo) == FOO_SIZEOF);
CTASSERT(sizeof(struct foo) == (1 << FOO_SHIFT));

Requested by:	jhb, phk
This commit is contained in:
Jake Burkholder 2002-04-01 21:55:00 +00:00
parent 657544fc48
commit d86b2422b9
2 changed files with 4 additions and 4 deletions
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4
sys/sparc64/include/param.h
View File

@ -176,9 +176,5 @@
#define pgtok(x) ((unsigned long)(x) * (PAGE_SIZE / 1024))
#define CTASSERT(x) _CTASSERT(x, __LINE__)
#define _CTASSERT(x, y) __CTASSERT(x, y)
#define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1]
#endif /* !_MACHINE_PARAM_H_ */
#endif /* !_NO_NAMESPACE_POLLUTION */

4
sys/sys/systm.h
View File

@ -78,6 +78,10 @@ extern int maxusers; /* system tune hint */
#define KASSERT(exp,msg)
#endif
#define CTASSERT(x) _CTASSERT(x, __LINE__)
#define _CTASSERT(x, y) __CTASSERT(x, y)
#define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1]
/*
* XXX the hints declarations are even more misplaced than most declarations
* in this file, since they are needed in one file (per arch) and only used