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Quiet compiler warnings about missing prototypes in Linux's bitops.h.

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This commit is contained in:
Bryan Henderson 1996-11-18 01:45:44 +00:00
parent 435d4f4a79
commit bd57c3afe5
1 changed files with 41 additions and 0 deletions
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41
src/backend/port/linux/asm/bitops.h Normal file
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/* This is a hack that lets us use the -Wmissing-prototypes compile option.
A bug or weakness in Linux's asm/bitops.h file makes it define a bunch
of inline functions without first declaring a prototype. This causes
-Wmissing-prototypes to generate warnings. These warnings are distracting
and, in the case of -Werror, fatal.
asm/bitops.h gets included by the Linux C library sem.h, which is included
in several Postgres backend source files.
Until Linux is fixed, we have our own version of asm/bitops.h that gets
included first because it is in a directory mentioned in a -I option,
whereas the Linux asm/bitops.h is in a standard include directory. (This
is GNU C preprocessor function).
Our asm/bitops.h declares prototypes and then includes the Linux
asm/bitops.h. If Linux changes these functions, our asm/bitops.h will
stop compiling and will have to be updated.
-Bryan 1996.11.17
*/
#ifndef POSTGRES_BITOPS_H
#define POSTGRES_BITOPS_H
#ifdef __SMP__
#define PG_BITOPS_VOLATILE volatile
#else
#define PG_BITOPS_VOLATILE
#endif
extern __inline__ int set_bit(int nr, PG_BITOPS_VOLATILE void * addr);
extern __inline__ int clear_bit(int nr, PG_BITOPS_VOLATILE void * addr);
extern __inline__ int change_bit(int nr, PG_BITOPS_VOLATILE void * addr);
extern __inline__ int test_bit(int nr, const PG_BITOPS_VOLATILE void * addr);
extern __inline__ int find_first_zero_bit(void * addr, unsigned size);
extern __inline__ int find_next_zero_bit (void * addr, int size, int offset);
extern __inline__ unsigned long ffz(unsigned long word);
#include_next <asm/bitops.h>
#endif