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mesa: Add a MUST_CHECK macro for __attribute__((warn_unused_result)).

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In the kernel, this is called __must_check; all our attribute macros in
Mesa appear to be uppercase, so I went with that.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Kenneth Graunke
2015-07-06 11:04:19 -07:00
parent 86a3557d7c
commit 128de6f6d7
2 changed files with 7 additions and 0 deletions
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1
configure.ac
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@@ -210,6 +210,7 @@ AX_GCC_FUNC_ATTRIBUTE([format])
AX_GCC_FUNC_ATTRIBUTE([malloc]) AX_GCC_FUNC_ATTRIBUTE([malloc])
AX_GCC_FUNC_ATTRIBUTE([packed]) AX_GCC_FUNC_ATTRIBUTE([packed])
AX_GCC_FUNC_ATTRIBUTE([unused]) AX_GCC_FUNC_ATTRIBUTE([unused])
AX_GCC_FUNC_ATTRIBUTE([warn_unused_result])
AM_CONDITIONAL([GEN_ASM_OFFSETS], test "x$GEN_ASM_OFFSETS" = xyes) AM_CONDITIONAL([GEN_ASM_OFFSETS], test "x$GEN_ASM_OFFSETS" = xyes)

6
src/util/macros.h
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@@ -182,6 +182,12 @@ do { \
#define UNUSED #define UNUSED
#endif #endif
#ifdef HAVE_FUNC_ATTRIBUTE_WARN_UNUSED_RESULT
#define MUST_CHECK __attribute__((warn_unused_result))
#else
#define MUST_CHECK
#endif
/** Compute ceiling of integer quotient of A divided by B. */ /** Compute ceiling of integer quotient of A divided by B. */
#define DIV_ROUND_UP( A, B ) ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 ) #define DIV_ROUND_UP( A, B ) ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 )