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Hide size class computation behind a layer of indirection.

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This class removes almost all the dependencies on size_classes.h, accessing the
data there only via the new module sc.h, which does not depend on any
configuration options.

In a subsequent commit, we'll remove the configure-time size class computations,
doing them at boot time, instead.
This commit is contained in:
David Goldblatt 2017-12-14 12:46:39 -08:00 • committed by David Goldblatt
parent fb924dd7bf
commit e904f813b4
46 changed files with 886 additions and 459 deletions
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62
src/sc.c Normal file
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#include "jemalloc/internal/jemalloc_preamble.h"
#include "jemalloc/internal/assert.h"
#include "jemalloc/internal/sc.h"
#include "jemalloc/internal/size_classes.h"
sc_data_t sc_data_global;
static void
fill_sc(sc_data_t *data, int index, int lg_base, int lg_delta, int ndelta,
bool psz, bool bin, int pgs, int lg_delta_lookup) {
sc_t *sc = &data->sc[index];
sc->index = index;
sc->lg_base = lg_base;
sc->lg_delta = lg_delta;
sc->ndelta = ndelta;
sc->psz = psz;
sc->bin = bin;
sc->pgs = pgs;
sc->lg_delta_lookup = lg_delta_lookup;
}
void
sc_data_init(sc_data_t *data) {
assert(SC_NTINY == NTBINS);
assert(SC_NSIZES == NSIZES);
assert(SC_NBINS == NBINS);
assert(NPSIZES <= SC_NPSIZES_MAX);
assert(!data->initialized);
data->initialized = true;
data->ntiny = NTBINS;
data->nlbins = NLBINS;
data->nbins = NBINS;
data->nsizes = NSIZES;
data->lg_ceil_nsizes = LG_CEIL_NSIZES;
data->npsizes = NPSIZES;
#if SC_NTINY != 0
data->lg_tiny_maxclass = LG_TINY_MAXCLASS;
#else
data->lg_tiny_maxclass = -1;
#endif
data->lookup_maxclass = LOOKUP_MAXCLASS;
data->small_maxclass = SMALL_MAXCLASS;
data->lg_large_minclass = LG_LARGE_MINCLASS;
data->large_minclass = LARGE_MINCLASS;
data->large_maxclass = LARGE_MAXCLASS;
#define no 0
#define yes 1
#define SC(index, lg_base_base, lg_delta, ndelta, psz, bin, pgs, \
lg_delta_lookup) \
fill_sc(data, index, lg_base_base, lg_delta, ndelta, psz, bin, \
pgs, lg_delta_lookup);
SIZE_CLASSES
#undef no
#undef yes
#undef SC
}
void
sc_boot() {
sc_data_init(&sc_data_global);
}