Add gpgrt_lock_ functions.

* src/gpg-error.h.in (GPGRT_LOCK_DEFINE): New.
(gpgrt_lock_init): New.
(gpgrt_lock_lock): New.
(gpgrt_lock_unlock): New.
(gpgrt_lock_destroy): New.
(gpgrt_yield): New.
* src/gpg-error.def.in: Add new functions.
* m4/lock.m4, m4/threadlib.m4: New. Taken from current gnulib.
* configure.ac: Call gl_LOCK.  Check size of pthread_mutex_t. Add
LIBTHREAD to GPG_ERROR_CONFIG_LIBS.
* src/err-codes.h.in (GPG_ERR_INV_LOCK_OBJ): New.
* src/gen-posix-lock-obj.c: New.
* src/gen-w32-lock-obj.c: New.
* src/lock.h, src/thread.h: New.
* src/posix-lock-obj.h, src/w32-lock-obj.h: New.
* src/posix-lock.c, src/w32-lock.c: New.
* src/posix-thread.c, src/w32-thread.c:
* src/w32-lock-obj-pub.in: New.
* src/mkheader.c (include_file): Support build time include files.
(write_special): Add keyword "include:lock-obj".
* src/Makefile.am:
(posix-lock-obj-pub.in): New rule.
(noinst_PROGRAMS): Add gen-*-lock-obj helpers.

* tests/t-common.h: New.
* tests/t-lock.c: New.
* tests/Makefile.am (t_lock_LDADD): Add new test.

--

This patch introduces the gpgrt_ functions which will be extended over
time to provide a library of commonly used code in GnuPG and
Libgcrypt.  Having them in a library named libgpg-error is a misnomer
but this way we can achieve a smooth upgrade path.

In contrasts to other GnuPG libraries, the gpgrt_ functions return a
simple gpg_err_code_t and not gpg_error_t.  The rationale for this is
that a source of error identifier does not make sense here; it is
better to use the source of error identifier of the caller.  This can
easily be achieved in a component by wrapping these function in a
gpg_error macro/inline.

There is no cross-compiling support for Posix platforms; the
gen-posix-lock-obj tool must be run on the target system.

Note that the gen-w32-lock-obj tool is not needed at build time but
was used to figure out ABI definitions for Windows.

Signed-off-by: Werner Koch <wk@gnupg.org>

1 files changed, 99 insertions, 0 deletions

diff --git a/tests/t-common.h b/tests/t-common.h
new file mode 100644
index 0000000..85bcd51
--- /dev/null
+++ b/tests/t-common.h
@@ -0,0 +1,99 @@
+/* t-common.h - Common code for the tests.
+ * Copyright (C) 2013 g10 Code GmbH
+ *
+ * This file is part of libgpg-error.
+ *
+ * libgpg-error is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * libgpg-error is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdarg.h>
+
+#include "../src/gpg-error.h"
+
+#ifndef PGM
+# error Macro PGM not defined.
+#endif
+
+
+static int verbose;
+static int debug;
+static int errorcount;
+
+
+static void
+die (const char *format, ...)
+{
+  va_list arg_ptr ;
+
+  fflush (stdout);
+#ifdef HAVE_FLOCKFILE
+  flockfile (stderr);
+#endif
+  fprintf (stderr, "%s: ", PGM);
+  va_start (arg_ptr, format) ;
+  vfprintf (stderr, format, arg_ptr);
+  va_end (arg_ptr);
+  if (*format && format[strlen(format)-1] != '\n')
+    putc ('\n', stderr);
+#ifdef HAVE_FLOCKFILE
+  funlockfile (stderr);
+#endif
+  exit (1);
+}
+
+
+static void
+fail (const char *format, ...)
+{
+  va_list arg_ptr;
+
+  fflush (stdout);
+#ifdef HAVE_FLOCKFILE
+  flockfile (stderr);
+#endif
+  fprintf (stderr, "%s: ", PGM);
+  va_start (arg_ptr, format);
+  vfprintf (stderr, format, arg_ptr);
+  va_end (arg_ptr);
+  if (*format && format[strlen(format)-1] != '\n')
+    putc ('\n', stderr);
+#ifdef HAVE_FLOCKFILE
+  funlockfile (stderr);
+#endif
+  errorcount++;
+  if (errorcount >= 50)
+    die ("stopped after 50 errors.");
+}
+
+
+static void
+show (const char *format, ...)
+{
+  va_list arg_ptr;
+
+  if (!verbose)
+    return;
+#ifdef HAVE_FLOCKFILE
+  flockfile (stderr);
+#endif
+  fprintf (stderr, "%s: ", PGM);
+  va_start (arg_ptr, format);
+  vfprintf (stderr, format, arg_ptr);
+  if (*format && format[strlen(format)-1] != '\n')
+    putc ('\n', stderr);
+  va_end (arg_ptr);
+#ifdef HAVE_FLOCKFILE
+  funlockfile (stderr);
+#endif
+}