fix smart match docs for lhs undef

[perl5.git] / perlio.c

diff --git a/perlio.c b/perlio.c
index 130671d..e42a78f 100644 (file)
--- a/perlio.c
+++ b/perlio.c
@@ -1963,7 +1963,7 @@ PERLIO_FUNCS_DECL(PerlIO_utf8) = {
     sizeof(PerlIO_funcs),
     "utf8",
     0,
-    PERLIO_K_DUMMY | PERLIO_K_UTF8,
+    PERLIO_K_DUMMY | PERLIO_K_UTF8 | PERLIO_K_MULTIARG,
     PerlIOUtf8_pushed,
     NULL,
     PerlIOBase_open,
@@ -1994,7 +1994,7 @@ PERLIO_FUNCS_DECL(PerlIO_byte) = {
     sizeof(PerlIO_funcs),
     "bytes",
     0,
-    PERLIO_K_DUMMY,
+    PERLIO_K_DUMMY | PERLIO_K_MULTIARG,
     PerlIOUtf8_pushed,
     NULL,
     PerlIOBase_open,
@@ -2412,6 +2412,7 @@ PerlIOUnix_refcnt_inc(int fd)
 
        PL_perlio_fd_refcnt[fd]++;
        if (PL_perlio_fd_refcnt[fd] <= 0) {
+           /* diag_listed_as: refcnt_inc: fd %d%s */
            Perl_croak(aTHX_ "refcnt_inc: fd %d: %d <= 0\n",
                       fd, PL_perlio_fd_refcnt[fd]);
        }
@@ -2422,6 +2423,7 @@ PerlIOUnix_refcnt_inc(int fd)
        MUTEX_UNLOCK(&PL_perlio_mutex);
 #endif
     } else {
+       /* diag_listed_as: refcnt_inc: fd %d%s */
        Perl_croak(aTHX_ "refcnt_inc: fd %d < 0\n", fd);
     }
 }
@@ -2437,10 +2439,12 @@ PerlIOUnix_refcnt_dec(int fd)
        MUTEX_LOCK(&PL_perlio_mutex);
 #endif
        if (fd >= PL_perlio_fd_refcnt_size) {
+           /* diag_listed_as: refcnt_dec: fd %d%s */
            Perl_croak(aTHX_ "refcnt_dec: fd %d >= refcnt_size %d\n",
                       fd, PL_perlio_fd_refcnt_size);
        }
        if (PL_perlio_fd_refcnt[fd] <= 0) {
+           /* diag_listed_as: refcnt_dec: fd %d%s */
            Perl_croak(aTHX_ "refcnt_dec: fd %d: %d <= 0\n",
                       fd, PL_perlio_fd_refcnt[fd]);
        }
@@ -2450,11 +2454,43 @@ PerlIOUnix_refcnt_dec(int fd)
        MUTEX_UNLOCK(&PL_perlio_mutex);
 #endif
     } else {
+       /* diag_listed_as: refcnt_dec: fd %d%s */
        Perl_croak(aTHX_ "refcnt_dec: fd %d < 0\n", fd);
     }
     return cnt;
 }
 
+int
+PerlIOUnix_refcnt(int fd)
+{
+    dTHX;
+    int cnt = 0;
+    if (fd >= 0) {
+       dVAR;
+#ifdef USE_ITHREADS
+       MUTEX_LOCK(&PL_perlio_mutex);
+#endif
+       if (fd >= PL_perlio_fd_refcnt_size) {
+           /* diag_listed_as: refcnt: fd %d%s */
+           Perl_croak(aTHX_ "refcnt: fd %d >= refcnt_size %d\n",
+                      fd, PL_perlio_fd_refcnt_size);
+       }
+       if (PL_perlio_fd_refcnt[fd] <= 0) {
+           /* diag_listed_as: refcnt: fd %d%s */
+           Perl_croak(aTHX_ "refcnt: fd %d: %d <= 0\n",
+                      fd, PL_perlio_fd_refcnt[fd]);
+       }
+       cnt = PL_perlio_fd_refcnt[fd];
+#ifdef USE_ITHREADS
+       MUTEX_UNLOCK(&PL_perlio_mutex);
+#endif
+    } else {
+       /* diag_listed_as: refcnt: fd %d%s */
+       Perl_croak(aTHX_ "refcnt: fd %d < 0\n", fd);
+    }
+    return cnt;
+}
+
 void
 PerlIO_cleanup(pTHX)
 {
@@ -4508,12 +4544,10 @@ PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
                 PerlIOBase(f)->flags);
 #endif
     {
-      /* Enable the first CRLF capable layer you can find, but if none
-       * found, the one we just pushed is fine.  This results in at
-       * any given moment at most one CRLF-capable layer being enabled
-       * in the whole layer stack. */
+      /* If the old top layer is a CRLF layer, reactivate it (if
+       * necessary) and remove this new layer from the stack */
         PerlIO *g = PerlIONext(f);
-        while (PerlIOValid(g)) {
+        if (PerlIOValid(g)) {
              PerlIOl *b = PerlIOBase(g);
              if (b && b->tab == &PerlIO_crlf) {
                   if (!(b->flags & PERLIO_F_CRLF))
@@ -4521,8 +4555,7 @@ PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
                   S_inherit_utf8_flag(g);
                   PerlIO_pop(aTHX_ f);
                   return code;
-             }           
-             g = PerlIONext(g);
+             }
         }
     }
     S_inherit_utf8_flag(f);