Use unlocked stdio more systematically

This can improve performance significantly on stdio-bottlenecked code.
E.g., make-docfile is 3x faster on my Fedora 25 x86-64 desktop.
* admin/merge-gnulib (GNULIB_MODULES): Add unlocked-io.
* lib-src/ebrowse.c, lib-src/emacsclient.c, lib-src/etags.c:
* lib-src/hexl.c, lib-src/make-docfile.c, lib-src/movemail.c:
* lib-src/profile.c, lib-src/update-game-score.c:
Include unlocked-io.h instead of stdio.h, since these programs are
single-threaded.
* lib/gnulib.mk.in, m4/gnulib-comp.m4: Regenerate.
* lib/unlocked-io.h, m4/unlocked-io.m4: New files, copied from Gnulib.
* src/charset.c, src/cm.c, src/emacs.c, src/image.c, src/keyboard.c:
* src/lread.c, src/term.c:
Include sysstdio.h, possibly instead of stdio.h, to define
the unlocked functions if the system does not provide them.
* src/charset.c, src/lread.c (getc_unlocked):
Remove, since sysstdio.h now defines it if needed.
* src/cm.c (cmputc, cmcheckmagic):
* src/dispnew.c (update_frame, update_frame_with_menu)
(update_frame_1, Fsend_string_to_terminal, Fding, bitch_at_user):
* src/emacs.c (main, Fdump_emacs):
* src/fileio.c (Fdo_auto_save, Fset_binary_mode):
* src/image.c (slurp_file, png_read_from_file, png_load_body)
(our_stdio_fill_input_buffer):
* src/keyboard.c (record_char, kbd_buffer_get_event, handle_interrupt):
* src/lread.c (readbyte_from_file):
* src/minibuf.c (read_minibuf_noninteractive):
* src/print.c (printchar_to_stream, strout)
(Fredirect_debugging_output):
* src/sysdep.c (reset_sys_modes, procfs_ttyname)
(procfs_get_total_memory):
* src/term.c (tty_ring_bell, tty_send_additional_strings)
(tty_set_terminal_modes, tty_reset_terminal_modes)
(tty_update_end, tty_clear_end_of_line, tty_write_glyphs)
(tty_write_glyphs_with_face, tty_insert_glyphs)
(tty_menu_activate):
* src/xfaces.c (Fx_load_color_file):
Use unlocked stdio when it should be safe.
* src/sysstdio.h (clearerr_unlocked, feof_unlocked, ferror_unlocked)
(fflush_unlocked, fgets_unlocked, fputc_unlocked, fputs_unlocked)
(fread_unlocked, fwrite_unlocked, getc_unlocked, getchar_unlocked)
(putc_unlocked, putchar_unloced): Provide substitutes if not declared.

8 files changed, 19 insertions, 14 deletions

diff --git a/lib-src/ebrowse.c b/lib-src/ebrowse.c
index 51d181997b1..e77b7c94cca 100644
--- a/lib-src/ebrowse.c
+++ b/lib-src/ebrowse.c
@@ -20,21 +20,21 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include <config.h>
 #include <stddef.h>
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>
 #include <assert.h>
 #include <getopt.h>
 
+#include <flexmember.h>
+#include <min-max.h>
+#include <unlocked-io.h>
+
 /* The SunOS compiler doesn't have SEEK_END.  */
 #ifndef SEEK_END
 #define SEEK_END 2
 #endif
 
-#include <flexmember.h>
-#include <min-max.h>
-
 /* Files are read in chunks of this number of bytes.  */
 
 enum { READ_CHUNK_SIZE = 100 * 1024 };
diff --git a/lib-src/emacsclient.c b/lib-src/emacsclient.c
index 8828b7652de..f1d4e8976da 100644
--- a/lib-src/emacsclient.c
+++ b/lib-src/emacsclient.c
@@ -73,7 +73,6 @@ char *w32_getenv (const char *);
 
 #include <stdarg.h>
 #include <ctype.h>
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <getopt.h>
@@ -84,6 +83,8 @@ char *w32_getenv (const char *);
 #include <signal.h>
 #include <errno.h>
 
+#include <unlocked-io.h>
+
 #ifndef VERSION
 #define VERSION "unspecified"
 #endif
diff --git a/lib-src/etags.c b/lib-src/etags.c
index 6f280d8ab40..e5ff7bd10fc 100644
--- a/lib-src/etags.c
+++ b/lib-src/etags.c
@@ -123,6 +123,7 @@ char pot_etags_version[] = "@(#) pot revision number is 17.38.1.4";
 #include <errno.h>
 #include <fcntl.h>
 #include <binary-io.h>
+#include <unlocked-io.h>
 #include <c-ctype.h>
 #include <c-strcase.h>
 
diff --git a/lib-src/hexl.c b/lib-src/hexl.c
index 319ce8bc890..d949af08902 100644
--- a/lib-src/hexl.c
+++ b/lib-src/hexl.c
@@ -22,11 +22,11 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <config.h>
 
 #include <inttypes.h>
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include <binary-io.h>
+#include <unlocked-io.h>
 
 static char *progname;
 
diff --git a/lib-src/make-docfile.c b/lib-src/make-docfile.c
index 9470bd635f5..6b2cc110403 100644
--- a/lib-src/make-docfile.c
+++ b/lib-src/make-docfile.c
@@ -39,10 +39,14 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <stdarg.h>
 #include <stddef.h>
 #include <stdint.h>
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
+#include <binary-io.h>
+#include <intprops.h>
+#include <min-max.h>
+#include <unlocked-io.h>
+
 #ifdef WINDOWSNT
 /* Defined to be sys_fopen in ms-w32.h, but only #ifdef emacs, so this
    is really just insurance.  */
@@ -50,10 +54,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <direct.h>
 #endif /* WINDOWSNT */
 
-#include <binary-io.h>
-#include <intprops.h>
-#include <min-max.h>
-
 #ifdef DOS_NT
 /* Defined to be sys_chdir in ms-w32.h, but only #ifdef emacs, so this
    is really just insurance.
diff --git a/lib-src/movemail.c b/lib-src/movemail.c
index cd12c48ed36..e5ca0b16611 100644
--- a/lib-src/movemail.c
+++ b/lib-src/movemail.c
@@ -59,7 +59,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/file.h>
-#include <stdio.h>
 #include <stdlib.h>
 #include <errno.h>
 #include <time.h>
@@ -69,6 +68,9 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <fcntl.h>
 #include <signal.h>
 #include <string.h>
+
+#include <unlocked-io.h>
+
 #include "syswait.h"
 #ifdef MAIL_USE_POP
 #include "pop.h"
diff --git a/lib-src/profile.c b/lib-src/profile.c
index 253f00e2d80..f4ab45c1718 100644
--- a/lib-src/profile.c
+++ b/lib-src/profile.c
@@ -34,11 +34,11 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <config.h>
 
 #include <inttypes.h>
-#include <stdio.h>
 #include <stdlib.h>
 
 #include <intprops.h>
 #include <systime.h>
+#include <unlocked-io.h>
 
 static struct timespec TV1;
 static int watch_not_started = 1; /* flag */
diff --git a/lib-src/update-game-score.c b/lib-src/update-game-score.c
index 5edc8e79569..942aeeb399d 100644
--- a/lib-src/update-game-score.c
+++ b/lib-src/update-game-score.c
@@ -39,7 +39,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <limits.h>
 #include <string.h>
 #include <stdlib.h>
-#include <stdio.h>
 #include <time.h>
 #include <pwd.h>
 #include <ctype.h>
@@ -47,6 +46,8 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <sys/stat.h>
 #include <getopt.h>
 
+#include <unlocked-io.h>
+
 #ifdef WINDOWSNT
 #include "ntlib.h"
 #endif