diff options
Diffstat (limited to 'lib/libc/gen/telldir.c')
| -rw-r--r-- | lib/libc/gen/telldir.c | 41 |
1 files changed, 21 insertions, 20 deletions
diff --git a/lib/libc/gen/telldir.c b/lib/libc/gen/telldir.c index 4954b973a915..d72b500b051c 100644 --- a/lib/libc/gen/telldir.c +++ b/lib/libc/gen/telldir.c @@ -47,13 +47,6 @@ __FBSDID("$FreeBSD$"); #include "telldir.h" /* - * The option SINGLEUSE may be defined to say that a telldir - * cookie may be used only once before it is freed. This option - * is used to avoid having memory usage grow without bound. - */ -#define SINGLEUSE - -/* * return a pointer into a directory */ long @@ -61,18 +54,31 @@ telldir(dirp) DIR *dirp; { struct ddloc *lp; + long idx; - if ((lp = (struct ddloc *)malloc(sizeof(struct ddloc))) == NULL) - return (-1); if (__isthreaded) _pthread_mutex_lock(&dirp->dd_lock); - lp->loc_index = dirp->dd_td->td_loccnt++; - lp->loc_seek = dirp->dd_seek; - lp->loc_loc = dirp->dd_loc; - LIST_INSERT_HEAD(&dirp->dd_td->td_locq, lp, loc_lqe); + LIST_FOREACH(lp, &dirp->dd_td->td_locq, loc_lqe) { + if (lp->loc_seek == dirp->dd_seek && + lp->loc_loc == dirp->dd_loc) + break; + } + if (lp == NULL) { + lp = malloc(sizeof(struct ddloc)); + if (lp == NULL) { + if (__isthreaded) + _pthread_mutex_unlock(&dirp->dd_lock); + return (-1); + } + lp->loc_index = dirp->dd_td->td_loccnt++; + lp->loc_seek = dirp->dd_seek; + lp->loc_loc = dirp->dd_loc; + LIST_INSERT_HEAD(&dirp->dd_td->td_locq, lp, loc_lqe); + } + idx = lp->loc_index; if (__isthreaded) _pthread_mutex_unlock(&dirp->dd_lock); - return (lp->loc_index); + return (idx); } /* @@ -94,7 +100,7 @@ _seekdir(dirp, loc) if (lp == NULL) return; if (lp->loc_loc == dirp->dd_loc && lp->loc_seek == dirp->dd_seek) - goto found; + return; (void) lseek(dirp->dd_fd, (off_t)lp->loc_seek, SEEK_SET); dirp->dd_seek = lp->loc_seek; dirp->dd_loc = 0; @@ -103,11 +109,6 @@ _seekdir(dirp, loc) if (dp == NULL) break; } -found: -#ifdef SINGLEUSE - LIST_REMOVE(lp, loc_lqe); - free((caddr_t)lp); -#endif } /* |