From 6860968c3adaf2e8c3cb51124bbdfccef74beeb9 Mon Sep 17 00:00:00 2001 From: Kaleb S KEITHLEY Date: Thu, 18 Feb 2016 11:21:12 -0500 Subject: qemu-block: deprecated/defunct, remove from tree qemu-block xlator is not used by anyone, or so I'm told. It's also substantially out of date. There's little reason to keep it in our sources. (And FedoraProject doesn't like bundled software either.) Change-Id: I4aeb2fdfd962ec6d93de6bae126874121272220a Signed-off-by: Kaleb S KEITHLEY Reviewed-on: http://review.gluster.org/13473 Smoke: Gluster Build System CentOS-regression: Gluster Build System NetBSD-regression: NetBSD Build System Reviewed-by: Shyamsundar Ranganathan Reviewed-by: Jeff Darcy --- contrib/qemu/qemu-coroutine.c | 135 ------------------------------------------ 1 file changed, 135 deletions(-) delete mode 100644 contrib/qemu/qemu-coroutine.c (limited to 'contrib/qemu/qemu-coroutine.c') diff --git a/contrib/qemu/qemu-coroutine.c b/contrib/qemu/qemu-coroutine.c deleted file mode 100644 index 5e19307eeda..00000000000 --- a/contrib/qemu/qemu-coroutine.c +++ /dev/null @@ -1,135 +0,0 @@ -/* - * QEMU coroutines - * - * Copyright IBM, Corp. 2011 - * - * Authors: - * Stefan Hajnoczi - * Kevin Wolf - * - * This work is licensed under the terms of the GNU LGPL, version 2 or later. - * See the COPYING.LIB file in the top-level directory. - * - */ - -#include "trace.h" -#include "qemu-common.h" -#include "qemu/thread.h" -#include "block/coroutine.h" -#include "block/coroutine_int.h" - -enum { - /* Maximum free pool size prevents holding too many freed coroutines */ - POOL_MAX_SIZE = 0, -}; - -/** Free list to speed up creation */ -static QemuMutex pool_lock; -static QSLIST_HEAD(, Coroutine) pool = QSLIST_HEAD_INITIALIZER(pool); -static unsigned int pool_size; - -Coroutine *qemu_coroutine_create(CoroutineEntry *entry) -{ - Coroutine *co; - - qemu_mutex_lock(&pool_lock); - co = QSLIST_FIRST(&pool); - if (co) { - QSLIST_REMOVE_HEAD(&pool, pool_next); - pool_size--; - } - qemu_mutex_unlock(&pool_lock); - - if (!co) { - co = qemu_coroutine_new(); - } - - co->entry = entry; - QTAILQ_INIT(&co->co_queue_wakeup); - return co; -} - -static void coroutine_delete(Coroutine *co) -{ - qemu_mutex_lock(&pool_lock); - if (pool_size < POOL_MAX_SIZE) { - QSLIST_INSERT_HEAD(&pool, co, pool_next); - co->caller = NULL; - pool_size++; - qemu_mutex_unlock(&pool_lock); - return; - } - qemu_mutex_unlock(&pool_lock); - - qemu_coroutine_delete(co); -} - -static void __attribute__((constructor)) coroutine_pool_init(void) -{ - qemu_mutex_init(&pool_lock); -} - -static void __attribute__((destructor)) coroutine_pool_cleanup(void) -{ - Coroutine *co; - Coroutine *tmp; - - QSLIST_FOREACH_SAFE(co, &pool, pool_next, tmp) { - QSLIST_REMOVE_HEAD(&pool, pool_next); - qemu_coroutine_delete(co); - } - - qemu_mutex_destroy(&pool_lock); -} - -static void coroutine_swap(Coroutine *from, Coroutine *to) -{ - CoroutineAction ret; - - ret = qemu_coroutine_switch(from, to, COROUTINE_YIELD); - - qemu_co_queue_run_restart(to); - - switch (ret) { - case COROUTINE_YIELD: - return; - case COROUTINE_TERMINATE: - trace_qemu_coroutine_terminate(to); - coroutine_delete(to); - return; - default: - abort(); - } -} - -void qemu_coroutine_enter(Coroutine *co, void *opaque) -{ - Coroutine *self = qemu_coroutine_self(); - - trace_qemu_coroutine_enter(self, co, opaque); - - if (co->caller) { - fprintf(stderr, "Co-routine re-entered recursively\n"); - abort(); - } - - co->caller = self; - co->entry_arg = opaque; - coroutine_swap(self, co); -} - -void coroutine_fn qemu_coroutine_yield(void) -{ - Coroutine *self = qemu_coroutine_self(); - Coroutine *to = self->caller; - - trace_qemu_coroutine_yield(self, to); - - if (!to) { - fprintf(stderr, "Co-routine is yielding to no one\n"); - abort(); - } - - self->caller = NULL; - coroutine_swap(self, to); -} -- cgit