403 lines
11 KiB
C
403 lines
11 KiB
C
/* Copyright (C) 2018-2021 Free Software Foundation, Inc.
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Contributed by Nicolas Koenig
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This file is part of the GNU Fortran runtime library (libgfortran).
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Libgfortran is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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Libgfortran is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef ASYNC_H
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#define ASYNC_H
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/* Async I/O will not work on targets which do not support
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__gthread_cond_t and __gthread_equal / __gthread_self. Check
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this. */
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#if defined(__GTHREAD_HAS_COND) && defined(__GTHREADS_CXX0X)
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#define ASYNC_IO 1
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#else
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#define ASYNC_IO 0
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#endif
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/* Defining DEBUG_ASYNC will enable somewhat verbose debugging
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output for async I/O. */
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#define DEBUG_ASYNC
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#undef DEBUG_ASYNC
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#ifdef DEBUG_ASYNC
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/* Define this if you want to use ANSI color escape sequences in your
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debugging output. */
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#define DEBUG_COLOR
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#ifdef DEBUG_COLOR
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#define MPREFIX "\033[30;46mM:\033[0m "
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#define TPREFIX "\033[37;44mT:\033[0m "
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#define RPREFIX "\033[37;41mR:\033[0m "
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#define DEBUG_RED "\033[31m"
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#define DEBUG_ORANGE "\033[33m"
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#define DEBUG_GREEN "\033[32m"
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#define DEBUG_DARKRED "\033[31;2m"
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#define DEBUG_PURPLE "\033[35m"
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#define DEBUG_NORM "\033[0m"
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#define DEBUG_REVERSE_RED "\033[41;37m"
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#define DEBUG_BLUE "\033[34m"
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#else
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#define MPREFIX "M: "
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#define TPREFIX "T: "
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#define RPREFIX ""
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#define DEBUG_RED ""
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#define DEBUG_ORANGE ""
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#define DEBUG_GREEN ""
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#define DEBUG_DARKRED ""
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#define DEBUG_PURPLE ""
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#define DEBUG_NORM ""
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#define DEBUG_REVERSE_RED ""
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#define DEBUG_BLUE ""
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#endif
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#define DEBUG_PRINTF(...) fprintf (stderr,__VA_ARGS__)
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#define IN_DEBUG_QUEUE(mutex) ({ \
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__label__ end; \
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aio_lock_debug *curr = aio_debug_head; \
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while (curr) { \
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if (curr->m == mutex) { \
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goto end; \
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} \
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curr = curr->next; \
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} \
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end:; \
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curr; \
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})
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#define TAIL_DEBUG_QUEUE ({ \
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aio_lock_debug *curr = aio_debug_head; \
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while (curr && curr->next) { \
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curr = curr->next; \
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} \
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curr; \
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})
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#define CHECK_LOCK(mutex, status) do { \
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aio_lock_debug *curr; \
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INTERN_LOCK (&debug_queue_lock); \
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if (__gthread_mutex_trylock (mutex)) { \
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if ((curr = IN_DEBUG_QUEUE (mutex))) { \
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sprintf (status, DEBUG_RED "%s():%d" DEBUG_NORM, curr->func, curr->line); \
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} else \
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sprintf (status, DEBUG_RED "unknown" DEBUG_NORM); \
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} \
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else { \
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__gthread_mutex_unlock (mutex); \
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sprintf (status, DEBUG_GREEN "unlocked" DEBUG_NORM); \
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} \
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INTERN_UNLOCK (&debug_queue_lock); \
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}while (0)
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#define T_ERROR(func, ...) do { \
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int t_error_temp; \
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t_error_temp = func(__VA_ARGS__); \
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if (t_error_temp) \
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ERROR (t_error_temp, "args: " #__VA_ARGS__ "\n"); \
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} while (0)
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#define NOTE(str, ...) do{ \
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char note_str[200]; \
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sprintf (note_str, "%s" DEBUG_PURPLE "NOTE: " DEBUG_NORM str, aio_prefix, ##__VA_ARGS__); \
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DEBUG_PRINTF ("%-90s %20s():%-5d\n", note_str, __FUNCTION__, __LINE__); \
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}while (0);
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#define ERROR(errnum, str, ...) do{ \
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char note_str[200]; \
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sprintf (note_str, "%s" DEBUG_REVERSE_RED "ERROR:" DEBUG_NORM " [%d] " str, aio_prefix, \
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errnum, ##__VA_ARGS__); \
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DEBUG_PRINTF ("%-68s %s():%-5d\n", note_str, __FUNCTION__, __LINE__); \
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}while (0)
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#define MUTEX_DEBUG_ADD(mutex) do { \
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aio_lock_debug *n; \
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n = malloc (sizeof(aio_lock_debug)); \
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n->prev = TAIL_DEBUG_QUEUE; \
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if (n->prev) \
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n->prev->next = n; \
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n->next = NULL; \
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n->line = __LINE__; \
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n->func = __FUNCTION__; \
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n->m = mutex; \
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if (!aio_debug_head) { \
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aio_debug_head = n; \
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} \
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} while (0)
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#define UNLOCK(mutex) do { \
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aio_lock_debug *curr; \
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DEBUG_PRINTF ("%s%-75s %20s():%-5d %18p\n", aio_prefix, DEBUG_GREEN "UNLOCK: " DEBUG_NORM #mutex, \
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__FUNCTION__, __LINE__, (void *) mutex); \
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INTERN_LOCK (&debug_queue_lock); \
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curr = IN_DEBUG_QUEUE (mutex); \
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if (curr) \
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{ \
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if (curr->prev) \
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curr->prev->next = curr->next; \
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if (curr->next) { \
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curr->next->prev = curr->prev; \
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if (curr == aio_debug_head) \
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aio_debug_head = curr->next; \
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} else { \
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if (curr == aio_debug_head) \
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aio_debug_head = NULL; \
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} \
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free (curr); \
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} \
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INTERN_UNLOCK (&debug_queue_lock); \
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INTERN_UNLOCK (mutex); \
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}while (0)
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#define TRYLOCK(mutex) ({ \
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char status[200]; \
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int res; \
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aio_lock_debug *curr; \
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res = __gthread_mutex_trylock (mutex); \
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INTERN_LOCK (&debug_queue_lock); \
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if (res) { \
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if ((curr = IN_DEBUG_QUEUE (mutex))) { \
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sprintf (status, DEBUG_RED "%s():%d" DEBUG_NORM, curr->func, curr->line); \
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} else \
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sprintf (status, DEBUG_RED "unknown" DEBUG_NORM); \
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} \
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else { \
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sprintf (status, DEBUG_GREEN "unlocked" DEBUG_NORM); \
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MUTEX_DEBUG_ADD (mutex); \
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} \
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DEBUG_PRINTF ("%s%-44s prev: %-35s %20s():%-5d %18p\n", aio_prefix, \
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DEBUG_DARKRED "TRYLOCK: " DEBUG_NORM #mutex, status, __FUNCTION__, __LINE__, \
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(void *) mutex); \
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INTERN_UNLOCK (&debug_queue_lock); \
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res; \
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})
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#define LOCK(mutex) do { \
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char status[200]; \
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CHECK_LOCK (mutex, status); \
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DEBUG_PRINTF ("%s%-42s prev: %-35s %20s():%-5d %18p\n", aio_prefix, \
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DEBUG_RED "LOCK: " DEBUG_NORM #mutex, status, __FUNCTION__, __LINE__, (void *) mutex); \
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INTERN_LOCK (mutex); \
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INTERN_LOCK (&debug_queue_lock); \
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MUTEX_DEBUG_ADD (mutex); \
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INTERN_UNLOCK (&debug_queue_lock); \
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DEBUG_PRINTF ("%s" DEBUG_RED "ACQ:" DEBUG_NORM " %-30s %78p\n", aio_prefix, #mutex, mutex); \
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} while (0)
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#define DEBUG_LINE(...) __VA_ARGS__
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#else
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#define DEBUG_PRINTF(...) {}
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#define CHECK_LOCK(au, mutex, status) {}
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#define NOTE(str, ...) {}
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#define DEBUG_LINE(...)
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#define T_ERROR(func, ...) func(__VA_ARGS__)
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#define LOCK(mutex) INTERN_LOCK (mutex)
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#define UNLOCK(mutex) INTERN_UNLOCK (mutex)
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#define TRYLOCK(mutex) (__gthread_mutex_trylock (mutex))
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#endif
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#define INTERN_LOCK(mutex) T_ERROR (__gthread_mutex_lock, mutex);
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#define INTERN_UNLOCK(mutex) T_ERROR (__gthread_mutex_unlock, mutex);
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#if ASYNC_IO
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/* au->lock has to be held when calling this macro. */
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#define SIGNAL(advcond) do{ \
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(advcond)->pending = 1; \
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DEBUG_PRINTF ("%s%-75s %20s():%-5d %18p\n", aio_prefix, DEBUG_ORANGE "SIGNAL: " DEBUG_NORM \
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#advcond, __FUNCTION__, __LINE__, (void *) advcond); \
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T_ERROR (__gthread_cond_broadcast, &(advcond)->signal); \
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} while (0)
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/* Has to be entered with mutex locked. */
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#define WAIT_SIGNAL_MUTEX(advcond, condition, mutex) do{ \
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__label__ finish; \
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DEBUG_PRINTF ("%s%-75s %20s():%-5d %18p\n", aio_prefix, DEBUG_BLUE "WAITING: " DEBUG_NORM \
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#advcond, __FUNCTION__, __LINE__, (void *) advcond); \
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if ((advcond)->pending || (condition)) \
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goto finish; \
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while (1) \
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{ \
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int err_ret = __gthread_cond_wait(&(advcond)->signal, mutex); \
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if (err_ret) internal_error (NULL, "WAIT_SIGNAL_MUTEX failed"); \
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if (condition) \
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{ \
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DEBUG_PRINTF ("%s%-75s %20s():%-5d %18p\n", aio_prefix, DEBUG_ORANGE \
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"REC: " DEBUG_NORM \
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#advcond, __FUNCTION__, __LINE__, (void *)advcond); \
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break; \
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} \
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} \
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finish: \
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(advcond)->pending = 0; \
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UNLOCK (mutex); \
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} while (0)
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/* au->lock has to be held when calling this macro. */
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#define REVOKE_SIGNAL(advcond) do{ \
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(advcond)->pending = 0; \
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} while (0)
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#else
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#define SIGNAL(advcond) do{} while(0)
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#define WAIT_SIGNAL_MUTEX(advcond, condition, mutex) do{} while(0)
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#define REVOKE_SIGNAL(advcond) do{} while(0)
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#endif
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#if ASYNC_IO
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DEBUG_LINE (extern __thread const char *aio_prefix);
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DEBUG_LINE (typedef struct aio_lock_debug{
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__gthread_mutex_t *m;
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int line;
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const char *func;
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struct aio_lock_debug *next;
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struct aio_lock_debug *prev;
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} aio_lock_debug;)
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DEBUG_LINE (extern aio_lock_debug *aio_debug_head;)
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DEBUG_LINE (extern __gthread_mutex_t debug_queue_lock;)
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/* Thread - local storage of the current unit we are looking at. Needed for
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error reporting. */
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extern __thread gfc_unit *thread_unit;
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#endif
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enum aio_do {
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AIO_INVALID = 0,
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AIO_DATA_TRANSFER_INIT,
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AIO_TRANSFER_SCALAR,
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AIO_TRANSFER_ARRAY,
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AIO_WRITE_DONE,
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AIO_READ_DONE,
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AIO_CLOSE
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};
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typedef union transfer_args
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{
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struct
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{
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void (*transfer) (struct st_parameter_dt *, bt, void *, int, size_t, size_t);
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bt arg_bt;
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void *data;
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int i;
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size_t s1;
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size_t s2;
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} scalar;
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struct
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{
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gfc_array_char *desc;
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int kind;
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gfc_charlen_type charlen;
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} array;
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} transfer_args;
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struct adv_cond
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{
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#if ASYNC_IO
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int pending;
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__gthread_cond_t signal;
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#endif
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};
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typedef struct async_unit
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{
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__gthread_mutex_t io_lock; /* Lock for doing actual I/O. */
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__gthread_mutex_t lock; /* Lock for manipulating the queue structure. */
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bool empty;
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struct
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{
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int waiting;
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int low;
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int high;
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struct adv_cond done;
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} id;
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#if ASYNC_IO
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struct adv_cond work;
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struct adv_cond emptysignal;
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struct st_parameter_dt *pdt;
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pthread_t thread;
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struct transfer_queue *head;
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struct transfer_queue *tail;
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struct {
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const char *message;
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st_parameter_common *cmp;
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bool has_error;
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int last_good_id;
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int family;
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bool fatal_error;
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} error;
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#endif
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} async_unit;
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void init_async_unit (gfc_unit *);
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internal_proto (init_async_unit);
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bool async_wait (st_parameter_common *, async_unit *);
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internal_proto (async_wait);
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bool async_wait_id (st_parameter_common *, async_unit *, int);
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internal_proto (async_wait_id);
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bool collect_async_errors (st_parameter_common *, async_unit *);
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internal_proto (collect_async_errors);
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void async_close (async_unit *);
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internal_proto (async_close);
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void enqueue_transfer (async_unit * au, transfer_args * arg, enum aio_do);
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internal_proto (enqueue_transfer);
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void enqueue_done (async_unit *, enum aio_do type);
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internal_proto (enqueue_done);
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int enqueue_done_id (async_unit *, enum aio_do type);
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internal_proto (enqueue_done_id);
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void enqueue_init (async_unit *);
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internal_proto (enqueue_init);
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void enqueue_data_transfer_init (async_unit *, st_parameter_dt *, int);
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internal_proto (enqueue_data_transfer_init);
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void enqueue_close (async_unit *);
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internal_proto (enqueue_close);
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#endif
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