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Use re-entrant locks on stdio

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This commit is contained in:
Justine Tunney 2022-05-22 08:13:13 -07:00
parent 4e9662cbc7
commit 1f229e4efc
78 changed files with 427 additions and 179 deletions
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29
libc/stdio/puts.c
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@ -18,21 +18,32 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/stdio/stdio.h"
/**
* Writes string w/ trailing newline to stdout.
*/
int puts(const char *s) {
FILE *f;
static int PutsImpl(const char *s, FILE *f) {
size_t n, r;
f = stdout;
if ((n = strlen(s))) {
r = fwrite(s, 1, n, f);
r = fwrite_unlocked(s, 1, n, f);
if (!r) return -1;
if (r < n) return r;
}
if (fputc('\n', f) == -1) {
if (feof(f)) return n;
if (fputc_unlocked('\n', f) == -1) {
if (feof_unlocked(f)) return n;
return -1;
}
return n + 1;
}
/**
* Writes string w/ trailing newline to stdout.
*
* @return non-negative number on success, or `EOF` on error with
* `errno` set and the `ferror(stdout)` state is updated
*/
int puts(const char *s) {
FILE *f;
int bytes;
f = stdout;
flockfile(f);
bytes = PutsImpl(s, f);
funlockfile(f);
return bytes;
}