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https://github.com/jart/cosmopolitan.git
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If threads are being used, then fork() will now acquire and release and runtime locks so that fork() may be safely used from threads. This also makes vfork() thread safe, because pthread mutexes will do nothing when the process is a child of vfork(). More torture tests have been written to confirm this all works like a charm. Additionally: - Invent hexpcpy() api - Rename nsync_malloc_() to kmalloc() - Complete posix named semaphore implementation - Make pthread_create() asynchronous signal safe - Add rm, rmdir, and touch to command interpreter builtins - Invent sigisprecious() and modify sigset functions to use it - Add unit tests for posix_spawn() attributes and fix its bugs One unresolved problem is the reclaiming of *NSYNC waiter memory in the forked child processes, within apps which have threads waiting on locks
63 lines
2.8 KiB
C
63 lines
2.8 KiB
C
#ifndef COSMOPOLITAN_LIBC_MEM_MEM_H_
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#define COSMOPOLITAN_LIBC_MEM_MEM_H_
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#define M_TRIM_THRESHOLD (-1)
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#define M_GRANULARITY (-2)
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#define M_MMAP_THRESHOLD (-3)
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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/*───────────────────────────────────────────────────────────────────────────│─╗
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│ cosmopolitan § dynamic memory ─╬─│┼
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╚────────────────────────────────────────────────────────────────────────────│*/
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void free(void *) libcesque;
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void *malloc(size_t) attributeallocsize((1)) mallocesque;
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void *calloc(size_t, size_t) attributeallocsize((1, 2)) mallocesque;
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void *memalign(size_t, size_t) attributeallocalign((1))
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attributeallocsize((2)) returnspointerwithnoaliases libcesque dontdiscard;
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void *realloc(void *, size_t) reallocesque;
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void *realloc_in_place(void *, size_t) reallocesque;
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void *reallocarray(void *, size_t, size_t) dontdiscard;
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void *valloc(size_t) attributeallocsize((1)) vallocesque;
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void *pvalloc(size_t) vallocesque;
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char *strdup(const char *) paramsnonnull() mallocesque;
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char *strndup(const char *, size_t) paramsnonnull() mallocesque;
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void *aligned_alloc(size_t, size_t) attributeallocalign((1))
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attributeallocsize((2)) returnspointerwithnoaliases libcesque dontdiscard;
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int posix_memalign(void **, size_t, size_t);
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bool __grow(void *, size_t *, size_t, size_t) paramsnonnull((1, 2)) libcesque;
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int malloc_trim(size_t);
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size_t bulk_free(void **, size_t);
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size_t malloc_usable_size(void *);
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void **independent_calloc(size_t, size_t, void **);
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void **independent_comalloc(size_t, size_t *, void **);
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wchar_t *wcsdup(const wchar_t *) strlenesque dontdiscard;
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struct mallinfo {
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size_t arena; /* non-mmapped space allocated from system */
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size_t ordblks; /* number of free chunks */
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size_t smblks; /* always 0 */
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size_t hblks; /* always 0 */
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size_t hblkhd; /* space in mmapped regions */
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size_t usmblks; /* maximum total allocated space */
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size_t fsmblks; /* always 0 */
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size_t uordblks; /* total allocated space */
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size_t fordblks; /* total free space */
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size_t keepcost; /* releasable (via malloc_trim) space */
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};
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struct mallinfo mallinfo(void);
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size_t malloc_footprint(void);
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size_t malloc_max_footprint(void);
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size_t malloc_footprint_limit(void);
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size_t malloc_set_footprint_limit(size_t);
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void malloc_inspect_all(void (*handler)(void *, void *, size_t, void *),
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void *);
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_MEM_MEM_H_ */
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