From fe1f55b877909a831f69497b53f2a64b952cd47d Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Sun, 2 Sep 2007 20:34:57 +0000 Subject: add a couple of macros for memory page alignment git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/lennart@1742 fefdeb5f-60dc-0310-8127-8f9354f1896f --- src/pulsecore/macro.h | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) (limited to 'src/pulsecore/macro.h') diff --git a/src/pulsecore/macro.h b/src/pulsecore/macro.h index efd0f5ed..53e52fd0 100644 --- a/src/pulsecore/macro.h +++ b/src/pulsecore/macro.h @@ -25,15 +25,39 @@ ***/ #include +#include #include +#include +#include + #include +#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 + static inline size_t pa_align(size_t l) { return (((l + sizeof(void*) - 1) / sizeof(void*)) * sizeof(void*)); } - #define PA_ALIGN(x) (pa_align(x)) +static inline void* pa_page_align_ptr(const void *p) { + return (void*) (((size_t) p) & ~(PA_PAGE_SIZE-1)); +} +#define PA_PAGE_ALIGN_PTR(x) (pa_page_align_ptr(x)) + +static inline size_t pa_page_align(size_t l) { + return l & ~(PA_PAGE_SIZE-1); +} +#define PA_PAGE_ALIGN(x) (pa_page_align(x)) + #define PA_ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0])) #define SA_MAX(a, b) ((a) > (b) ? (a) : (b)) -- cgit