[pypy-commit] pypy fast-gil: Don't need the errno-saving logic

[arigo]

Author: Armin Rigo <arigo at tunes.org>
Branch: fast-gil
Changeset: r72208:40e4dd588bd7
Date: 2014-06-25 11:13 +0200
http://bitbucket.org/pypy/pypy/changeset/40e4dd588bd7/

Log:	Don't need the errno-saving logic

diff --git a/pypy/module/thread/gil.py b/pypy/module/thread/gil.py
--- a/pypy/module/thread/gil.py
+++ b/pypy/module/thread/gil.py
@@ -70,9 +70,7 @@
 def before_external_call():
     # this function must not raise, in such a way that the exception
     # transformer knows that it cannot raise!
-    e = get_errno()
     rgil.gil_release()
-    set_errno(e)
 before_external_call._gctransformer_hint_cannot_collect_ = True
 before_external_call._dont_reach_me_in_del_ = True
 
diff --git a/rpython/translator/c/src/thread_gil.c b/rpython/translator/c/src/thread_gil.c
--- a/rpython/translator/c/src/thread_gil.c
+++ b/rpython/translator/c/src/thread_gil.c
@@ -56,7 +56,7 @@
 
 void RPyGilAcquire(void)
 {
-    /* Acquires the GIL.  Note: this function saves and restores 'errno'.
+    /* Acquires the GIL.
      */
     long old_fastgil = lock_test_and_set(&rpy_fastgil, 1);
 
@@ -67,7 +67,6 @@
     }
     else {
         /* Otherwise, another thread is busy with the GIL. */
-        int old_errno = errno;
 
         /* Register me as one of the threads that is actively waiting
            for the GIL.  The number of such threads is found in
@@ -107,8 +106,6 @@
         }
         atomic_decrement(&rpy_waiting_threads);
         mutex_unlock(&mutex_gil_stealer);
-
-        errno = old_errno;
     }
     assert(RPY_FASTGIL_LOCKED(rpy_fastgil));