Replace locking code in estream functions.

* src/posix-lock.c: Add weak program for pthread_mutex_trylock.
(_gpgrt_lock_trylock): New.
* src/w32-lock.c (_gpgrt_lock_init): Add missing return statement.
(_gpgrt_lock_trylock): New.
* src/visibility.c (gpgrt_set_syscall_clamp): New.
(gpgrt_lock_trylock): New.
(gpgrt_vsnprintf): Fix symbol name.
* src/init.c (DllMain): Mark unused arg.
* src/estream.c: Replace npth mutexes by our own locks.  Replace yeild
macro by _gpgrt_yield.
(pre_syscall_func, post_syscall_func): New.
(do_deinit): Clear both new vars.
(es_func_fd_read, es_func_fd_write): Call pre and post syscall
functions instead of the former SYSCALL macros.
(es_func_w32_read, es_func_w32_write): Ditto.
(es_func_fd_seek, es_func_w32_seek, es_func_fp_read)
(es_func_fp_write, es_func_fp_seek, es_func_fp_destroy): Bracket
syscalls with the pre- and post-syscall fucntions.
(do_npth_read, do_npth_write): Remove.
(_gpgrt_es_init): Remove call to mutex init.  It is now statically
initialized.
(_gpgrt_set_syscall_clamp): New.
(es_create): Destroy stream lock on error.
(do_close): Destroy stream lock.

1 files changed, 4 insertions, 1 deletions

diff --git a/src/gpg-error.vers b/src/gpg-error.vers
index a4ff726..d07372e 100644
--- a/src/gpg-error.vers
+++ b/src/gpg-error.vers
@@ -36,6 +36,9 @@ GPG_ERROR_1.0 {
     gpgrt_lock_unlock;
     gpgrt_lock_destroy;
     gpgrt_yield;
+    gpgrt_lock_trylock;
+
+    gpgrt_set_syscall_clamp;
 
     gpgrt_fopen;
     gpgrt_mopen;
@@ -56,7 +59,7 @@ GPG_ERROR_1.0 {
     gpgrt_fileno_unlocked;
     gpgrt_syshd;
     gpgrt_syshd_unlocked;
-    _gpgrt_set_std_stream;
+    _gpgrt_set_std_fd;
     _gpgrt_get_std_stream;
     gpgrt_flockfile;
     gpgrt_ftrylockfile;