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| author | Paul Eggert <eggert@cs.ucla.edu> | 2012-09-15 00:06:56 -0700 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2012-09-15 00:06:56 -0700 |
| commit | 0328b6de4a92676b4ad4616095ce19a4f51d1c4d (patch) | |
| tree | fba6da827e1383b3ff6ee4b738d2ac74a5956dde /src/process.c | |
| parent | 823751606a90e3850551b43e707d58bbf58033dc (diff) | |
| download | emacs-0328b6de4a92676b4ad4616095ce19a4f51d1c4d.tar.gz | |
Port better to POSIX hosts lacking _setjmp.
* configure.ac (HAVE__SETJMP, HAVE_SIGSETJMP): New symbols.
(_setjmp, _longjmp): Remove.
* src/lisp.h: Include <setjmp.h> here, since we use its symbols here.
All instances of '#include <setjmp.h>' removed, if the
only reason for the instance was because "lisp.h" was included.
(sys_jmp_buf, sys_setjmp, sys_longjmp): New symbols.
Unless otherwise specified, replace all uses of jmp_buf, _setjmp,
and _longjmp with the new symbols. Emacs already uses _setjmp if
available, so this change affects only POSIXish hosts that have
sigsetjmp but not _setjmp, such as some versions of Solaris and
Unixware. (Also, POSIX-2008 marks _setjmp as obsolescent.)
* src/image.c (_setjmp, _longjmp) [HAVE_PNG && !HAVE__SETJMP]: New macros.
(png_load_body) [HAVE_PNG]:
(PNG_LONGJMP) [HAVE_PNG && PNG_LIBPNG_VER < 10500]:
(PNG_JMPBUF) [HAVE_PNG && PNG_LIBPNG_VER >= 10500]:
Use _setjmp and _longjmp rather than sys_setjmp and sys_longjmp,
since PNG requires jmp_buf. This is the only exception to the
general rule that we now use sys_setjmp and sys_longjmp.
This exception is OK since this code does not change the signal
mask or longjmp out of a signal handler.
Fixes: debbugs:12446
Diffstat (limited to 'src/process.c')
| -rw-r--r-- | src/process.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/src/process.c b/src/process.c index b4b05a4b2e2..6dbff6f4b16 100644 --- a/src/process.c +++ b/src/process.c @@ -25,12 +25,9 @@ along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ #include <stdio.h> #include <errno.h> -#include <setjmp.h> #include <sys/types.h> /* Some typedefs are used in sys/file.h. */ #include <sys/file.h> #include <sys/stat.h> -#include <setjmp.h> - #include <unistd.h> #include <fcntl.h> @@ -5421,7 +5418,7 @@ read_process_output (Lisp_Object proc, register int channel) /* Sending data to subprocess */ -static jmp_buf send_process_frame; +static sys_jmp_buf send_process_frame; static Lisp_Object process_sent_to; static _Noreturn void @@ -5431,7 +5428,7 @@ handle_pipe_signal (int sig) sigemptyset (&unblocked); sigaddset (&unblocked, SIGPIPE); pthread_sigmask (SIG_UNBLOCK, &unblocked, 0); - _longjmp (send_process_frame, 1); + sys_longjmp (send_process_frame, 1); } static void @@ -5640,7 +5637,7 @@ send_process (volatile Lisp_Object proc, const char *volatile buf, /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2, CFLAGS="-g -O": The value of the parameter `proc' is clobbered when returning with longjmp despite being declared volatile. */ - if (!_setjmp (send_process_frame)) + if (!sys_setjmp (send_process_frame)) { p = XPROCESS (proc); /* Repair any setjmp clobbering. */ process_sent_to = proc; |