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>