mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 15:03:34 +00:00
e398f3887c
- NetBSD should now have faster synchronization - POSIX barriers may now be shared across processes - An edge case with memory map tracking has been fixed - Grand Central Dispatch is no longer used on MacOS ARM64 - POSIX mutexes in normal mode now use futexes across processes
83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
#ifndef COSMOPOLITAN_MAPS_H_
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#define COSMOPOLITAN_MAPS_H_
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#include "libc/intrin/atomic.h"
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#include "libc/intrin/tree.h"
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#include "libc/runtime/runtime.h"
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#include "libc/thread/tls2.internal.h"
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COSMOPOLITAN_C_START_
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#define MAPS_RETRY ((void *)-1)
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#define MAP_TREE_CONTAINER(e) TREE_CONTAINER(struct Map, tree, e)
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struct Map {
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char *addr; /* granule aligned */
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size_t size; /* must be nonzero */
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int64_t off; /* ignore for anon */
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int prot; /* memory protects */
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int flags; /* memory map flag */
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bool iscow; /* windows nt only */
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bool readonlyfile; /* windows nt only */
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unsigned visited; /* checks and fork */
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intptr_t hand; /* windows nt only */
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union {
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struct Tree tree;
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struct Map *freed;
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};
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};
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struct Maps {
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atomic_int lock;
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struct Tree *maps;
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_Atomic(struct Map *) freed;
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size_t count;
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size_t pages;
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_Atomic(char *) pick;
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struct Map stack;
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struct Map guard;
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};
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struct AddrSize {
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char *addr;
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size_t size;
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};
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extern struct Maps __maps;
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void __maps_init(void);
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bool __maps_lock(void);
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void __maps_check(void);
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void __maps_unlock(void);
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void *__maps_randaddr(void);
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void *__maps_pickaddr(size_t);
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void __maps_add(struct Map *);
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void __maps_free(struct Map *);
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struct Map *__maps_alloc(void);
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struct Map *__maps_floor(const char *);
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void __maps_stack(char *, int, int, size_t, int, intptr_t);
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int __maps_compare(const struct Tree *, const struct Tree *);
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struct AddrSize __get_main_stack(void);
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forceinline optimizespeed int __maps_search(const void *key,
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const struct Tree *node) {
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const char *addr = (const char *)key;
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const struct Map *map = (const struct Map *)MAP_TREE_CONTAINER(node);
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return (addr > map->addr) - (addr < map->addr);
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}
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static inline struct Map *__maps_next(struct Map *map) {
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struct Tree *node;
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if ((node = tree_next(&map->tree)))
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return MAP_TREE_CONTAINER(node);
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return 0;
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}
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static inline struct Map *__maps_first(void) {
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struct Tree *node;
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if ((node = tree_first(__maps.maps)))
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return MAP_TREE_CONTAINER(node);
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return 0;
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}
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COSMOPOLITAN_C_END_
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#endif /* COSMOPOLITAN_MAPS_H_ */
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