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author | Rich Felker <dalias@aerifal.cx> | 2012-10-27 19:52:40 -0400 |
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committer | Rich Felker <dalias@aerifal.cx> | 2012-10-27 19:52:40 -0400 |
commit | 8fc7b5965ac6a000c93c7362276a6a7b193647f4 (patch) | |
tree | 6ffe5b0141543fc39213a87290ec2e75a2540735 /src/stdio/putc.c | |
parent | 3ffb556c58ba69b4f52ae50fa92424300bd58bd1 (diff) | |
download | musl-8fc7b5965ac6a000c93c7362276a6a7b193647f4.tar.gz musl-8fc7b5965ac6a000c93c7362276a6a7b193647f4.tar.xz musl-8fc7b5965ac6a000c93c7362276a6a7b193647f4.zip |
separate getc/putc from fgetc/fputc
for conformance, two functions should not have the same address. a conforming program could use the addresses of getc and fgetc in ways that assume they are distinct. normally i would just use a wrapper, but these functions are so small and performance-critical that an extra layer of function call could make the one that's a wrapper nearly twice as slow, so I'm just duplicating the code instead.
Diffstat (limited to 'src/stdio/putc.c')
-rw-r--r-- | src/stdio/putc.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/stdio/putc.c b/src/stdio/putc.c new file mode 100644 index 00000000..fa893496 --- /dev/null +++ b/src/stdio/putc.c @@ -0,0 +1,12 @@ +#include "stdio_impl.h" + +int putc(int c, FILE *f) +{ + if (f->lock < 0 || !__lockfile(f)) + return putc_unlocked(c, f); + c = putc_unlocked(c, f); + __unlockfile(f); + return c; +} + +weak_alias(putc, _IO_putc); |