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d1a745c17c
* Implement __zipos_dup Makes ZiposHandle reference-counted by an `rc` field in a union with its freelist `next` pointer. The functions `__zipos_free` and `__zipos_keep` function as incref/decref for it. Adds `__zipos_postdup` to fix metadata on file descriptors after dup-like operations, and adds zipos support to `sys_dup_nt` + `sys_close_nt`. * Remove noop __zipos_postdup rc is never a zipos file because it is always a previously unused file descriptor. fd is never a zipos file because that case has been handled above by __zipos_fcntl.
64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
#ifndef COSMOPOLITAN_LIBC_ZIPOS_ZIPOS_H_
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#define COSMOPOLITAN_LIBC_ZIPOS_ZIPOS_H_
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COSMOPOLITAN_C_START_
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#define ZIPOS_PATH_MAX 1024
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#define ZIPOS_SYNTHETIC_DIRECTORY 0
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struct stat;
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struct iovec;
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struct Zipos;
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struct ZiposUri {
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uint32_t len;
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char path[ZIPOS_PATH_MAX];
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};
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struct ZiposHandle {
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struct ZiposHandle *next;
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struct Zipos *zipos;
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size_t size;
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size_t mapsize;
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size_t cfile;
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_Atomic(int) refs;
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size_t pos; // TODO atomic
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uint8_t *mem;
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uint8_t data[];
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};
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struct Zipos {
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long pagesz;
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uint8_t *map;
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uint8_t *cdir;
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uint64_t dev;
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size_t *index;
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size_t records;
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struct ZiposHandle *freelist;
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};
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int __zipos_close(int);
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void __zipos_free(struct ZiposHandle *);
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struct ZiposHandle *__zipos_keep(struct ZiposHandle *);
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struct Zipos *__zipos_get(void) pureconst;
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size_t __zipos_normpath(char *, const char *, size_t);
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ssize_t __zipos_find(struct Zipos *, struct ZiposUri *);
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ssize_t __zipos_scan(struct Zipos *, struct ZiposUri *);
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ssize_t __zipos_parseuri(const char *, struct ZiposUri *);
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uint64_t __zipos_inode(struct Zipos *, int64_t, const void *, size_t);
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int __zipos_open(struct ZiposUri *, int);
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void __zipos_postdup(int, int);
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int __zipos_access(struct ZiposUri *, int);
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int __zipos_stat(struct ZiposUri *, struct stat *);
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int __zipos_fstat(struct ZiposHandle *, struct stat *);
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int __zipos_stat_impl(struct Zipos *, size_t, struct stat *);
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ssize_t __zipos_read(struct ZiposHandle *, const struct iovec *, size_t,
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ssize_t);
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int64_t __zipos_seek(struct ZiposHandle *, int64_t, unsigned);
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int __zipos_fcntl(int, int, uintptr_t);
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int __zipos_notat(int, const char *);
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void *__zipos_mmap(void *, uint64_t, int32_t, int32_t, struct ZiposHandle *,
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int64_t);
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COSMOPOLITAN_C_END_
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#endif /* COSMOPOLITAN_LIBC_ZIPOS_ZIPOS_H_ */
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