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fsdev/p9array.h: check scalar type in P9ARRAY_NEW()

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Make sure at compile time that the scalar type of the array
requested to be created via P9ARRAY_NEW() matches the scalar
type of the passed auto reference variable (unique pointer).

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Message-Id: <c1965e2a096835dc9e1d4d659dfb15d96755cbe0.1633097129.git.qemu_oss@crudebyte.com>
This commit is contained in:
Christian Schoenebeck 2021-10-01 16:27:13 +02:00
parent 30e702abf6
commit c0451f0bc4
1 changed files with 6 additions and 0 deletions
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6
fsdev/p9array.h
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@ -27,6 +27,8 @@
#ifndef QEMU_P9ARRAY_H #ifndef QEMU_P9ARRAY_H
#define QEMU_P9ARRAY_H #define QEMU_P9ARRAY_H
#include "qemu/compiler.h"
/** /**
* P9Array provides a mechanism to access arrays in common C-style (e.g. by * P9Array provides a mechanism to access arrays in common C-style (e.g. by
* square bracket [] operator) in conjunction with reference variables that * square bracket [] operator) in conjunction with reference variables that
@ -149,6 +151,10 @@
* @param len - amount of array elements to be allocated immediately * @param len - amount of array elements to be allocated immediately
*/ */
#define P9ARRAY_NEW(scalar_type, auto_var, len) \ #define P9ARRAY_NEW(scalar_type, auto_var, len) \
QEMU_BUILD_BUG_MSG( \
!__builtin_types_compatible_p(scalar_type, typeof(*auto_var)), \
"P9Array scalar type mismatch" \
); \
p9array_new_##scalar_type((&auto_var), len) p9array_new_##scalar_type((&auto_var), len)
#endif /* QEMU_P9ARRAY_H */ #endif /* QEMU_P9ARRAY_H */