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Diffstat (limited to 'archive/align_b4_memalign.c')
| -rw-r--r-- | archive/align_b4_memalign.c | 24 |
1 files changed, 0 insertions, 24 deletions
diff --git a/archive/align_b4_memalign.c b/archive/align_b4_memalign.c deleted file mode 100644 index 1cd4032d..00000000 --- a/archive/align_b4_memalign.c +++ /dev/null @@ -1,24 +0,0 @@ -/* Code fragment of how to get a buffer from the heap that has a specific - * alignment. The typical alignment is to a "page" whose size is often - * 4096 bytes. */ - - uint8_t * wrkBuff; /* will get pointer to heap allocation */ - uint8_t * wrkPos; /* will get aligned pointer within wrkBuff */ - uint32_t sz_of_aligned = 1234; /* number of aligned bytes required */ - - int psz; - -#if defined(HAVE_SYSCONF) && defined(_SC_PAGESIZE) - psz = sysconf(_SC_PAGESIZE); /* POSIX.1 (was getpagesize()) */ -#else - psz = 4096; /* give up, pick likely figure */ -#endif - - - /* perhaps use posix_memalign() instead. Yes but not always available */ - wrkBuff = (uint8_t *)malloc(sz_of_aligned + psz); - wrkPos = (uint8_t *)(((sg_uintptr_t)wrkBuff + psz - 1) & (~(psz - 1))); - -/* The disadvantage of this approach is that it needs both wrkBuff and wrkPos - * to be held by the application. The wrkBuff is only needed for the - * corresponding free(), all other uses should be via wrkPos. */ |