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);
96 lines
2.8 KiB
C
96 lines
2.8 KiB
C
#include <limits.h>
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#include <strings.h>
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#define JEMALLOC_VERSION "@jemalloc_version@"
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#define JEMALLOC_VERSION_MAJOR @jemalloc_version_major@
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#define JEMALLOC_VERSION_MINOR @jemalloc_version_minor@
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#define JEMALLOC_VERSION_BUGFIX @jemalloc_version_bugfix@
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#define JEMALLOC_VERSION_NREV @jemalloc_version_nrev@
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#define JEMALLOC_VERSION_GID "@jemalloc_version_gid@"
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# define MALLOCX_LG_ALIGN(la) (la)
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# if LG_SIZEOF_PTR == 2
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# define MALLOCX_ALIGN(a) (ffs(a)-1)
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# else
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# define MALLOCX_ALIGN(a) \
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((a < (size_t)INT_MAX) ? ffs(a)-1 : ffs(a>>32)+31)
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# endif
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# define MALLOCX_ZERO ((int)0x40)
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/* Bias arena index bits so that 0 encodes "MALLOCX_ARENA() unspecified". */
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# define MALLOCX_ARENA(a) ((int)(((a)+1) << 8))
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#ifdef JEMALLOC_EXPERIMENTAL
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# define ALLOCM_LG_ALIGN(la) (la)
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# if LG_SIZEOF_PTR == 2
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# define ALLOCM_ALIGN(a) (ffs(a)-1)
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# else
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# define ALLOCM_ALIGN(a) \
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((a < (size_t)INT_MAX) ? ffs(a)-1 : ffs(a>>32)+31)
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# endif
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# define ALLOCM_ZERO ((int)0x40)
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# define ALLOCM_NO_MOVE ((int)0x80)
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/* Bias arena index bits so that 0 encodes "ALLOCM_ARENA() unspecified". */
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# define ALLOCM_ARENA(a) ((int)(((a)+1) << 8))
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# define ALLOCM_SUCCESS 0
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# define ALLOCM_ERR_OOM 1
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# define ALLOCM_ERR_NOT_MOVED 2
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#endif
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/*
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* Name mangling for public symbols is controlled by --with-mangling and
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* --with-jemalloc-prefix. With default settings the je_ prefix is stripped by
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* these macro definitions.
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*/
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#ifndef JEMALLOC_NO_RENAME
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# undef je_malloc_conf
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# undef je_malloc_message
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# undef je_malloc
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# undef je_calloc
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# undef je_posix_memalign
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# undef je_aligned_alloc
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# undef je_realloc
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# undef je_free
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# undef je_mallocx
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# undef je_rallocx
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# undef je_xallocx
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# undef je_sallocx
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# undef je_dallocx
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# undef je_nallocx
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# undef je_mallctl
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# undef je_mallctlnametomib
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# undef je_mallctlbymib
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# undef je_malloc_stats_print
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# undef je_malloc_usable_size
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# undef je_memalign
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# undef je_valloc
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# undef je_allocm
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# undef je_rallocm
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# undef je_sallocm
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# undef je_dallocm
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# undef je_nallocm
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#endif
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#ifdef JEMALLOC_HAVE_ATTR
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# define JEMALLOC_ATTR(s) __attribute__((s))
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# define JEMALLOC_EXPORT JEMALLOC_ATTR(visibility("default"))
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# define JEMALLOC_ALIGNED(s) JEMALLOC_ATTR(aligned(s))
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# define JEMALLOC_SECTION(s) JEMALLOC_ATTR(section(s))
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# define JEMALLOC_NOINLINE JEMALLOC_ATTR(noinline)
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#elif _MSC_VER
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# define JEMALLOC_ATTR(s)
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# ifdef DLLEXPORT
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# define JEMALLOC_EXPORT __declspec(dllexport)
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# else
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# define JEMALLOC_EXPORT __declspec(dllimport)
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# endif
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# define JEMALLOC_ALIGNED(s) __declspec(align(s))
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# define JEMALLOC_SECTION(s) __declspec(allocate(s))
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# define JEMALLOC_NOINLINE __declspec(noinline)
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#else
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# define JEMALLOC_ATTR(s)
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# define JEMALLOC_EXPORT
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# define JEMALLOC_ALIGNED(s)
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# define JEMALLOC_SECTION(s)
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# define JEMALLOC_NOINLINE
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#endif
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