From: Kan Liang <[email protected]> Improve the readability by using meaningful enum (-EAGAIN, -EINVAL and 0) to replace the three returning states (0, -1 and 1).
Suggested-by: Wang Nan <[email protected]> Signed-off-by: Kan Liang <[email protected]> --- tools/perf/util/mmap.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c index c19a4e6..38fa69d 100644 --- a/tools/perf/util/mmap.c +++ b/tools/perf/util/mmap.c @@ -282,7 +282,7 @@ int perf_mmap__read_init(struct perf_mmap *md, bool overwrite, *endp = overwrite ? old : head; if (*startp == *endp) - return 0; + return -EAGAIN; size = *endp - *startp; if (size > (unsigned long)(md->mask) + 1) { @@ -291,7 +291,7 @@ int perf_mmap__read_init(struct perf_mmap *md, bool overwrite, md->prev = head; perf_mmap__consume(md, overwrite); - return 0; + return -EAGAIN; } /* @@ -299,10 +299,10 @@ int perf_mmap__read_init(struct perf_mmap *md, bool overwrite, * most of data from it. */ if (overwrite_rb_find_range(data, md->mask, head, startp, endp)) - return -1; + return -EINVAL; } - return 1; + return 0; } int perf_mmap__push(struct perf_mmap *md, bool overwrite, @@ -316,8 +316,8 @@ int perf_mmap__push(struct perf_mmap *md, bool overwrite, int rc = 0; rc = perf_mmap__read_init(md, overwrite, &start, &end); - if (rc < 1) - return rc; + if (rc < 0) + return (rc == -EAGAIN) ? 0 : -1; size = end - start; -- 2.5.5
