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#define JEMALLOC_CHUNK_C_
#include "jemalloc/internal/jemalloc_internal.h"
/******************************************************************************/
/* Data. */
const char *opt_dss = DSS_DEFAULT;
size_t opt_lg_chunk = 0;
/* Various chunk-related settings. */
size_t chunksize;
size_t chunksize_mask; /* (chunksize - 1). */
size_t chunk_npages;
/******************************************************************************/
bool
chunk_boot(void)
{
#ifdef _WIN32
SYSTEM_INFO info;
GetSystemInfo(&info);
/*
* Verify actual page size is equal to or an integral multiple of
* configured page size.
*/
if (info.dwPageSize & ((1U << LG_PAGE) - 1))
return (true);
/*
* Configure chunksize (if not set) to match granularity (usually 64K),
* so pages_map will always take fast path.
*/
if (!opt_lg_chunk) {
opt_lg_chunk = ffs_u((unsigned)info.dwAllocationGranularity)
- 1;
}
#else
if (!opt_lg_chunk)
opt_lg_chunk = LG_CHUNK_DEFAULT;
#endif
/* Set variables according to the value of opt_lg_chunk. */
chunksize = (ZU(1) << opt_lg_chunk);
assert(chunksize >= PAGE);
chunksize_mask = chunksize - 1;
chunk_npages = (chunksize >> LG_PAGE);
return (false);
}
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