path: root/include/stdlib.h
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author√Črico Nogueira <>2021-03-09 18:02:13 -0300
committerRich Felker <>2021-09-23 20:09:22 -0400
commitb76f37fd5625d038141b52184956fb4b7838e9a5 (patch)
tree8375a3587dcf9c921cedb4858f4c6d2400f909cd /include/stdlib.h
parent7be59733d71ada3a32a98622507399253f1d5e48 (diff)
add qsort_r and make qsort a wrapper around it
we make qsort a wrapper by providing a wrapper_cmp function that uses the extra argument as a function pointer. should be optimized to a tail call on most architectures, as long as it's built with -fomit-frame-pointer, so the performance impact should be minimal. to keep the git history clean, for now qsort_r is implemented in qsort.c and qsort is implemented in qsort_nr.c. qsort.c also received a few trivial cleanups, including replacing (*cmp)() calls with cmp(). qsort_nr.c contains only wrapper_cmp and qsort as a qsort_r wrapper itself.
Diffstat (limited to 'include/stdlib.h')
1 files changed, 1 insertions, 0 deletions
diff --git a/include/stdlib.h b/include/stdlib.h
index b54a051f..7af86e3b 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -146,6 +146,7 @@ int clearenv(void);
#define WCOREDUMP(s) ((s) & 0x80)
#define WIFCONTINUED(s) ((s) == 0xffff)
void *reallocarray (void *, size_t, size_t);
+void qsort_r (void *, size_t, size_t, int (*)(const void *, const void *, void *), void *);
#ifdef _GNU_SOURCE