Rich Felker
1b0cdc8700
functions which open in-memory FILE stream variants all shared a tail with __fdopen, adding the FILE structure to stdio's open file list. replacing this common tail with a function call reduces code size and duplication of logic. the list is also partially encapsulated now. function signatures were chosen to facilitate tail call optimization and reduce the need for additional accessor functions. with these changes, static linked programs that do not use stdio no longer have an open file list at all.
66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
#ifndef LIBC_H
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#define LIBC_H
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#include <stdlib.h>
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#include <stdio.h>
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#include <limits.h>
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struct __locale_map;
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struct __locale_struct {
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const struct __locale_map *volatile cat[6];
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};
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struct __libc {
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int can_do_threads;
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int threaded;
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int secure;
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volatile int threads_minus_1;
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size_t *auxv;
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size_t tls_size;
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size_t page_size;
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struct __locale_struct global_locale;
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};
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#ifndef PAGE_SIZE
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#define PAGE_SIZE libc.page_size
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#endif
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#ifdef __PIC__
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#define ATTR_LIBC_VISIBILITY __attribute__((visibility("hidden")))
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#else
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#define ATTR_LIBC_VISIBILITY
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#endif
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extern struct __libc __libc ATTR_LIBC_VISIBILITY;
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#define libc __libc
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extern size_t __hwcap ATTR_LIBC_VISIBILITY;
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extern size_t __sysinfo ATTR_LIBC_VISIBILITY;
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extern char *__progname, *__progname_full;
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/* Designed to avoid any overhead in non-threaded processes */
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void __lock(volatile int *) ATTR_LIBC_VISIBILITY;
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void __unlock(volatile int *) ATTR_LIBC_VISIBILITY;
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int __lockfile(FILE *) ATTR_LIBC_VISIBILITY;
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void __unlockfile(FILE *) ATTR_LIBC_VISIBILITY;
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#define LOCK(x) __lock(x)
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#define UNLOCK(x) __unlock(x)
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void __synccall(void (*)(void *), void *);
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int __setxid(int, int, int, int);
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extern char **__environ;
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#undef weak_alias
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#define weak_alias(old, new) \
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extern __typeof(old) new __attribute__((weak, alias(#old)))
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#undef LFS64_2
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#define LFS64_2(x, y) weak_alias(x, y)
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#undef LFS64
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#define LFS64(x) LFS64_2(x, x##64)
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#endif
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