Fix quitting bug when buffers are frozen

Problem noted by Eli Zaretskii in:
http://lists.gnu.org/archive/html/emacs-devel/2017-01/msg00721.html
This patch also fixes some other issues in that report.
* src/lisp.h (incr_rarely_quit): Remove.
All callers changed to use rarely_quit directly.
* src/search.c (freeze_buffer_relocation)
(thaw_buffer_relocation): New functions.
(looking_at_1, fast_looking_at, search_buffer):
Use them to fix bug when quitting when buffers are frozen.
* src/sysdep.c (emacs_intr_read): Rename from emacs_nointr_read.
All uses changed.

1 files changed, 5 insertions, 5 deletions

diff --git a/src/sysdep.c b/src/sysdep.c
index 4155c205712..91b2a5cb943 100644
--- a/src/sysdep.c
+++ b/src/sysdep.c
@@ -2508,12 +2508,12 @@ emacs_close (int fd)
 #endif
 
 /* Read from FD to a buffer BUF with size NBYTE.
-   If interrupted, either quit or retry the read.
-   Process any quits and pending signals immediately if INTERRUPTIBLE.
+   If interrupted, process any quits and pending signals immediately
+   if INTERRUPTIBLE, and then retry the read unless quitting.
    Return the number of bytes read, which might be less than NBYTE.
    On error, set errno to a value other than EINTR, and return -1.  */
 static ptrdiff_t
-emacs_nointr_read (int fd, void *buf, ptrdiff_t nbyte, bool interruptible)
+emacs_intr_read (int fd, void *buf, ptrdiff_t nbyte, bool interruptible)
 {
   ssize_t result;
 
@@ -2537,14 +2537,14 @@ emacs_nointr_read (int fd, void *buf, ptrdiff_t nbyte, bool interruptible)
 ptrdiff_t
 emacs_read (int fd, void *buf, ptrdiff_t nbyte)
 {
-  return emacs_nointr_read (fd, buf, nbyte, false);
+  return emacs_intr_read (fd, buf, nbyte, false);
 }
 
 /* Like emacs_read, but also process quits and pending signals.  */
 ptrdiff_t
 emacs_read_quit (int fd, void *buf, ptrdiff_t nbyte)
 {
-  return emacs_nointr_read (fd, buf, nbyte, true);
+  return emacs_intr_read (fd, buf, nbyte, true);
 }
 
 /* Write to FILEDES from a buffer BUF with size NBYTE, retrying if