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core: Replace PA_PAGE_SIZE with pa_page_size()

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PA_PAGE_SIZE using sysconf() may return a negative number

CID 1137925, CID 1137926, CID 1138485

instead of calling sysconf() directly, add function pa_page_size()
which uses the guestimate 4096 in case sysconf(_SC_PAGE_SIZE) fails

using PA_ONCE to only evaluate sysconf() once
This commit is contained in:
Peter Meerwald-Stadler 2016-08-18 01:06:47 +02:00
parent c99efbffd6
commit 45d9030638
10 changed files with 55 additions and 38 deletions
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21
src/pulsecore/macro.h
View file

@ -44,17 +44,6 @@
#endif
#endif
#if defined(PAGE_SIZE)
#define PA_PAGE_SIZE ((size_t) PAGE_SIZE)
#elif defined(PAGESIZE)
#define PA_PAGE_SIZE ((size_t) PAGESIZE)
#elif defined(HAVE_SYSCONF)
#define PA_PAGE_SIZE ((size_t) (sysconf(_SC_PAGE_SIZE)))
#else
/* Let's hope it's like x86. */
#define PA_PAGE_SIZE ((size_t) 4096)
#endif
/* Rounds down */
static inline void* PA_ALIGN_PTR(const void *p) {
return (void*) (((size_t) p) & ~(sizeof(void*) - 1));
@ -65,16 +54,6 @@ static inline size_t PA_ALIGN(size_t l) {
return ((l + sizeof(void*) - 1) & ~(sizeof(void*) - 1));
}
/* Rounds down */
static inline void* PA_PAGE_ALIGN_PTR(const void *p) {
return (void*) (((size_t) p) & ~(PA_PAGE_SIZE - 1));
}
/* Rounds up */
static inline size_t PA_PAGE_ALIGN(size_t l) {
return (l + PA_PAGE_SIZE - 1) & ~(PA_PAGE_SIZE - 1);
}
#if defined(__GNUC__)
#define PA_UNUSED __attribute__ ((unused))
#else