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: /usr/share/doc/sg3-utils/examples/archive/ [ drwxr-xr-x ]
name : align_b4_memalign.c /* Code fragment of how to get a buffer of heap that has a specific * alignment, typically 'page' size which is 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)));