mirror of
https://github.com/jemalloc/jemalloc.git
synced 2026-04-15 07:01:42 +03:00
d82a5e6a34
Implement the *allocx() API, which is a successor to the *allocm() API.
The *allocx() functions are slightly simpler to use because they have
fewer parameters, they directly return the results of primary interest,
and mallocx()/rallocx() avoid the strict aliasing pitfall that
allocm()/rallocx() share with posix_memalign(). The following code
violates strict aliasing rules:
foo_t *foo;
allocm((void **)&foo, NULL, 42, 0);
whereas the following is safe:
foo_t *foo;
void *p;
allocm(&p, NULL, 42, 0);
foo = (foo_t *)p;
mallocx() does not have this problem:
foo_t *foo = (foo_t *)mallocx(42, 0);
59 lines
1,010 B
C
59 lines
1,010 B
C
#include "test/jemalloc_test.h"
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TEST_BEGIN(test_same_size)
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{
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void *p;
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size_t sz, tsz;
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p = mallocx(42, 0);
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assert_ptr_not_null(p, "Unexpected mallocx() error");
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sz = sallocx(p, 0);
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tsz = xallocx(p, sz, 0, 0);
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assert_zu_eq(tsz, sz, "Unexpected size change: %zu --> %zu", sz, tsz);
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dallocx(p, 0);
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}
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TEST_END
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TEST_BEGIN(test_extra_no_move)
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{
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void *p;
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size_t sz, tsz;
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p = mallocx(42, 0);
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assert_ptr_not_null(p, "Unexpected mallocx() error");
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sz = sallocx(p, 0);
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tsz = xallocx(p, sz, sz-42, 0);
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assert_zu_eq(tsz, sz, "Unexpected size change: %zu --> %zu", sz, tsz);
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dallocx(p, 0);
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}
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TEST_END
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TEST_BEGIN(test_no_move_fail)
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{
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void *p;
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size_t sz, tsz;
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p = mallocx(42, 0);
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assert_ptr_not_null(p, "Unexpected mallocx() error");
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sz = sallocx(p, 0);
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tsz = xallocx(p, sz + 5, 0, 0);
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assert_zu_eq(tsz, sz, "Unexpected size change: %zu --> %zu", sz, tsz);
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dallocx(p, 0);
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}
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TEST_END
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int
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main(void)
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{
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return (test(
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test_same_size,
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test_extra_no_move,
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test_no_move_fail));
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}
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