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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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15
test/unit/size_classes.c
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@@ -142,11 +142,11 @@ TEST_BEGIN(test_overflow) {
max_size_class = get_max_size_class();
max_psz = max_size_class + PAGE;
assert_u_eq(sz_size2index(max_size_class+1), NSIZES,
assert_u_eq(sz_size2index(max_size_class+1), SC_NSIZES,
"sz_size2index() should return NSIZES on overflow");
assert_u_eq(sz_size2index(ZU(PTRDIFF_MAX)+1), NSIZES,
assert_u_eq(sz_size2index(ZU(PTRDIFF_MAX)+1), SC_NSIZES,
"sz_size2index() should return NSIZES on overflow");
assert_u_eq(sz_size2index(SIZE_T_MAX), NSIZES,
assert_u_eq(sz_size2index(SIZE_T_MAX), SC_NSIZES,
"sz_size2index() should return NSIZES on overflow");
assert_zu_eq(sz_s2u(max_size_class+1), 0,
@@ -156,13 +156,16 @@ TEST_BEGIN(test_overflow) {
assert_zu_eq(sz_s2u(SIZE_T_MAX), 0,
"sz_s2u() should return 0 on overflow");
assert_u_eq(sz_psz2ind(max_size_class+1), NPSIZES,
assert_u_eq(sz_psz2ind(max_size_class+1), sc_data_global.npsizes,
"sz_psz2ind() should return NPSIZES on overflow");
assert_u_eq(sz_psz2ind(ZU(PTRDIFF_MAX)+1), NPSIZES,
assert_u_eq(sz_psz2ind(ZU(PTRDIFF_MAX)+1), sc_data_global.npsizes,
"sz_psz2ind() should return NPSIZES on overflow");
assert_u_eq(sz_psz2ind(SIZE_T_MAX), NPSIZES,
assert_u_eq(sz_psz2ind(SIZE_T_MAX), sc_data_global.npsizes,
"sz_psz2ind() should return NPSIZES on overflow");
assert_u_le(sc_data_global.npsizes, SC_NPSIZES_MAX,
"Dynamic value of npsizes is higher than static bound.");
assert_zu_eq(sz_psz2u(max_size_class+1), max_psz,
"sz_psz2u() should return (LARGE_MAXCLASS + PAGE) for unsupported"
" size");