re PR fortran/25829 ([F03] Asynchronous IO support)

2018-07-25  Nicolas Koenig  <koenigni@gcc.gnu.org>
	Thomas Koenig <tkoenig@gcc.gnu.org>

	PR fortran/25829
	* gfortran.texi: Add description of asynchronous I/O.
	* trans-decl.c (gfc_finish_var_decl): Treat asynchronous variables
	as volatile.
	* trans-io.c (gfc_build_io_library_fndecls): Rename st_wait to
	st_wait_async and change argument spec from ".X" to ".w".
	(gfc_trans_wait): Pass ID argument via reference.

2018-07-25  Nicolas Koenig  <koenigni@gcc.gnu.org>
	Thomas Koenig <tkoenig@gcc.gnu.org>

	PR fortran/25829
	* gfortran.dg/f2003_inquire_1.f03: Add write statement.
	* gfortran.dg/f2003_io_1.f03: Add wait statement.

2018-07-25  Nicolas Koenig  <koenigni@gcc.gnu.org>
	Thomas Koenig <tkoenig@gcc.gnu.org>

	PR fortran/25829
	* Makefile.am: Add async.c to gfor_io_src.
	Add async.h to gfor_io_headers.
	* Makefile.in: Regenerated.
	* gfortran.map: Add _gfortran_st_wait_async.
	* io/async.c: New file.
	* io/async.h: New file.
	* io/close.c: Include async.h.
	(st_close): Call async_wait for an asynchronous unit.
	* io/file_pos.c (st_backspace): Likewise.
	(st_endfile): Likewise.
	(st_rewind): Likewise.
	(st_flush): Likewise.
	* io/inquire.c: Add handling for asynchronous PENDING
	and ID arguments.
	* io/io.h (st_parameter_dt): Add async bit.
	(st_parameter_wait): Correct.
	(gfc_unit): Add au pointer.
	(st_wait_async): Add prototype.
	(transfer_array_inner): Likewise.
	(st_write_done_worker): Likewise.
	* io/open.c: Include async.h.
	(new_unit): Initialize asynchronous unit.
	* io/transfer.c (async_opt): New struct.
	(wrap_scalar_transfer): New function.
	(transfer_integer): Call wrap_scalar_transfer to do the work.
	(transfer_real): Likewise.
	(transfer_real_write): Likewise.
	(transfer_character): Likewise.
	(transfer_character_wide): Likewise.
	(transfer_complex): Likewise.
	(transfer_array_inner): New function.
	(transfer_array): Call transfer_array_inner.
	(transfer_derived): Call wrap_scalar_transfer.
	(data_transfer_init): Check for asynchronous I/O.
	Perform a wait operation on any pending asynchronous I/O
	if the data transfer is synchronous. Copy PDT and enqueue
	thread for data transfer.
	(st_read_done_worker): New function.
	(st_read_done): Enqueue transfer or call st_read_done_worker.
	(st_write_done_worker): New function.
	(st_write_done): Enqueue transfer or call st_read_done_worker.
	(st_wait): Document as no-op for compatibility reasons.
	(st_wait_async): New function.
	* io/unit.c (insert_unit): Use macros LOCK, UNLOCK and TRYLOCK;
	add NOTE where necessary.
	(get_gfc_unit): Likewise.
	(init_units): Likewise.
	(close_unit_1): Likewise. Call async_close if asynchronous.
	(close_unit): Use macros LOCK and UNLOCK.
	(finish_last_advance_record): Likewise.
	(newunit_alloc): Likewise.
	* io/unix.c (find_file): Likewise.
	(flush_all_units_1): Likewise.
	(flush_all_units): Likewise.
	* libgfortran.h (generate_error_common): Add prototype.
	* runtime/error.c: Include io.h and async.h.
	(generate_error_common): New function.

2018-07-25  Nicolas Koenig  <koenigni@gcc.gnu.org>
	Thomas Koenig <tkoenig@gcc.gnu.org>

	PR fortran/25829
	* testsuite/libgomp.fortran/async_io_1.f90: New test.
	* testsuite/libgomp.fortran/async_io_2.f90: New test.
	* testsuite/libgomp.fortran/async_io_3.f90: New test.
	* testsuite/libgomp.fortran/async_io_4.f90: New test.
	* testsuite/libgomp.fortran/async_io_5.f90: New test.
	* testsuite/libgomp.fortran/async_io_6.f90: New test.
	* testsuite/libgomp.fortran/async_io_7.f90: New test.


Co-Authored-By: Thomas Koenig <tkoenig@gcc.gnu.org>

From-SVN: r262978

1 files changed, 15 insertions, 14 deletions

diff --git a/libgfortran/io/unix.c b/libgfortran/io/unix.c
index a8fd07a..4a133fd 100644
--- a/libgfortran/io/unix.c
+++ b/libgfortran/io/unix.c
@@ -27,6 +27,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 
 #include "io.h"
 #include "unix.h"
+#include "async.h"
 #include <limits.h>
 
 #ifdef HAVE_UNISTD_H
@@ -1742,7 +1743,7 @@ find_file (const char *file, gfc_charlen_type file_len)
   id = id_from_path (path);
 #endif
 
-  __gthread_mutex_lock (&unit_lock);
+  LOCK (&unit_lock);
 retry:
   u = find_file0 (unit_root, FIND_FILE0_ARGS);
   if (u != NULL)
@@ -1751,20 +1752,20 @@ retry:
       if (! __gthread_mutex_trylock (&u->lock))
 	{
 	  /* assert (u->closed == 0); */
-	  __gthread_mutex_unlock (&unit_lock);
+	  UNLOCK (&unit_lock);
 	  goto done;
 	}
 
       inc_waiting_locked (u);
     }
-  __gthread_mutex_unlock (&unit_lock);
+  UNLOCK (&unit_lock);
   if (u != NULL)
     {
-      __gthread_mutex_lock (&u->lock);
+      LOCK (&u->lock);
       if (u->closed)
 	{
-	  __gthread_mutex_lock (&unit_lock);
-	  __gthread_mutex_unlock (&u->lock);
+	  LOCK (&unit_lock);
+	  UNLOCK (&u->lock);
 	  if (predec_waiting_locked (u) == 0)
 	    free (u);
 	  goto retry;
@@ -1794,7 +1795,7 @@ flush_all_units_1 (gfc_unit *u, int min_unit)
 	    return u;
 	  if (u->s)
 	    sflush (u->s);
-	  __gthread_mutex_unlock (&u->lock);
+	  UNLOCK (&u->lock);
 	}
       u = u->right;
     }
@@ -1807,31 +1808,31 @@ flush_all_units (void)
   gfc_unit *u;
   int min_unit = 0;
 
-  __gthread_mutex_lock (&unit_lock);
+  LOCK (&unit_lock);
   do
     {
       u = flush_all_units_1 (unit_root, min_unit);
       if (u != NULL)
 	inc_waiting_locked (u);
-      __gthread_mutex_unlock (&unit_lock);
+      UNLOCK (&unit_lock);
       if (u == NULL)
 	return;
 
-      __gthread_mutex_lock (&u->lock);
+      LOCK (&u->lock);
 
       min_unit = u->unit_number + 1;
 
       if (u->closed == 0)
 	{
 	  sflush (u->s);
-	  __gthread_mutex_lock (&unit_lock);
-	  __gthread_mutex_unlock (&u->lock);
+	  LOCK (&unit_lock);
+	  UNLOCK (&u->lock);
 	  (void) predec_waiting_locked (u);
 	}
       else
 	{
-	  __gthread_mutex_lock (&unit_lock);
-	  __gthread_mutex_unlock (&u->lock);
+	  LOCK (&unit_lock);
+	  UNLOCK (&u->lock);
 	  if (predec_waiting_locked (u) == 0)
 	    free (u);
 	}