mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 03:27:39 +00:00
fa20edc44d
- Remove most __ASSEMBLER__ __LINKER__ ifdefs - Rename libc/intrin/bits.h to libc/serialize.h - Block pthread cancelation in fchmodat() polyfill - Remove `clang-format off` statements in third_party
93 lines
2.7 KiB
C++
93 lines
2.7 KiB
C++
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/* -------------------------- system alloc setup ------------------------- */
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/* Operations on mflags */
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#define use_lock(M) ((M)->mflags & USE_LOCK_BIT)
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#define enable_lock(M) ((M)->mflags |= USE_LOCK_BIT)
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#if USE_LOCKS
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#define disable_lock(M) ((M)->mflags &= ~USE_LOCK_BIT)
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#else
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#define disable_lock(M)
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#endif
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#define use_mmap(M) ((M)->mflags & USE_MMAP_BIT)
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#define enable_mmap(M) ((M)->mflags |= USE_MMAP_BIT)
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#if HAVE_MMAP
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#define disable_mmap(M) ((M)->mflags &= ~USE_MMAP_BIT)
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#else
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#define disable_mmap(M)
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#endif
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#define use_noncontiguous(M) ((M)->mflags & USE_NONCONTIGUOUS_BIT)
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#define disable_contiguous(M) ((M)->mflags |= USE_NONCONTIGUOUS_BIT)
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#define set_lock(M,L)\
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((M)->mflags = (L)?\
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((M)->mflags | USE_LOCK_BIT) :\
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((M)->mflags & ~USE_LOCK_BIT))
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/* page-align a size */
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#define page_align(S)\
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(((S) + (mparams.page_size - SIZE_T_ONE)) & ~(mparams.page_size - SIZE_T_ONE))
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/* granularity-align a size */
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#define granularity_align(S)\
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(((S) + (mparams.granularity - SIZE_T_ONE))\
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& ~(mparams.granularity - SIZE_T_ONE))
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/* For mmap, use granularity alignment on windows, else page-align */
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#if defined(WIN32) || defined(__COSMOPOLITAN__)
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#define mmap_align(S) granularity_align(S)
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#else
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#define mmap_align(S) page_align(S)
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#endif
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/* For sys_alloc, enough padding to ensure can malloc request on success */
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#define SYS_ALLOC_PADDING (TOP_FOOT_SIZE + MALLOC_ALIGNMENT)
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#define is_page_aligned(S)\
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(((size_t)(S) & (mparams.page_size - SIZE_T_ONE)) == 0)
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#define is_granularity_aligned(S)\
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(((size_t)(S) & (mparams.granularity - SIZE_T_ONE)) == 0)
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/* True if segment S holds address A */
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#define segment_holds(S, A)\
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((char*)(A) >= S->base && (char*)(A) < S->base + S->size)
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/* Return segment holding given address */
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static msegmentptr segment_holding(mstate m, char* addr) {
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msegmentptr sp = &m->seg;
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for (;;) {
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if (addr >= sp->base && addr < sp->base + sp->size)
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return sp;
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if ((sp = sp->next) == 0)
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return 0;
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}
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}
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/* Return true if segment contains a segment link */
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static int has_segment_link(mstate m, msegmentptr ss) {
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msegmentptr sp = &m->seg;
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for (;;) {
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if ((char*)sp >= ss->base && (char*)sp < ss->base + ss->size)
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return 1;
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if ((sp = sp->next) == 0)
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return 0;
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}
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}
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#ifndef MORECORE_CANNOT_TRIM
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#define should_trim(M,s) ((s) > (M)->trim_check)
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#else /* MORECORE_CANNOT_TRIM */
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#define should_trim(M,s) (0)
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#endif /* MORECORE_CANNOT_TRIM */
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/*
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TOP_FOOT_SIZE is padding at the end of a segment, including space
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that may be needed to place segment records and fenceposts when new
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noncontiguous segments are added.
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*/
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#define TOP_FOOT_SIZE\
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(align_offset(chunk2mem(0))+pad_request(sizeof(struct malloc_segment))+MIN_CHUNK_SIZE)
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