coroutine: move into libqemuutil.a library

The coroutine files are currently referenced by the block-obj-y
variable. The coroutine functionality though is already used by
more than just the block code. eg migration code uses coroutine
yield. In the future the I/O channel code will also use the
coroutine yield functionality. Since the coroutine code is nicely
self-contained it can be easily built as part of the libqemuutil.a
library, making it widely available.

The headers are also moved into include/qemu, instead of the
include/block directory, since they are now part of the util
codebase, and the impl was never in the block/ directory
either.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>

1 files changed, 0 insertions, 186 deletions

diff --git a/qemu-coroutine-lock.c b/qemu-coroutine-lock.c
deleted file mode 100644
index 6b4903334b..0000000000
--- a/qemu-coroutine-lock.c
+++ /dev/null
@@ -1,186 +0,0 @@
-/*
- * coroutine queues and locks
- *
- * Copyright (c) 2011 Kevin Wolf <kwolf@redhat.com>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#include "qemu-common.h"
-#include "block/coroutine.h"
-#include "block/coroutine_int.h"
-#include "qemu/queue.h"
-#include "trace.h"
-
-void qemu_co_queue_init(CoQueue *queue)
-{
-    QTAILQ_INIT(&queue->entries);
-}
-
-void coroutine_fn qemu_co_queue_wait(CoQueue *queue)
-{
-    Coroutine *self = qemu_coroutine_self();
-    QTAILQ_INSERT_TAIL(&queue->entries, self, co_queue_next);
-    qemu_coroutine_yield();
-    assert(qemu_in_coroutine());
-}
-
-/**
- * qemu_co_queue_run_restart:
- *
- * Enter each coroutine that was previously marked for restart by
- * qemu_co_queue_next() or qemu_co_queue_restart_all().  This function is
- * invoked by the core coroutine code when the current coroutine yields or
- * terminates.
- */
-void qemu_co_queue_run_restart(Coroutine *co)
-{
-    Coroutine *next;
-
-    trace_qemu_co_queue_run_restart(co);
-    while ((next = QTAILQ_FIRST(&co->co_queue_wakeup))) {
-        QTAILQ_REMOVE(&co->co_queue_wakeup, next, co_queue_next);
-        qemu_coroutine_enter(next, NULL);
-    }
-}
-
-static bool qemu_co_queue_do_restart(CoQueue *queue, bool single)
-{
-    Coroutine *self = qemu_coroutine_self();
-    Coroutine *next;
-
-    if (QTAILQ_EMPTY(&queue->entries)) {
-        return false;
-    }
-
-    while ((next = QTAILQ_FIRST(&queue->entries)) != NULL) {
-        QTAILQ_REMOVE(&queue->entries, next, co_queue_next);
-        QTAILQ_INSERT_TAIL(&self->co_queue_wakeup, next, co_queue_next);
-        trace_qemu_co_queue_next(next);
-        if (single) {
-            break;
-        }
-    }
-    return true;
-}
-
-bool coroutine_fn qemu_co_queue_next(CoQueue *queue)
-{
-    assert(qemu_in_coroutine());
-    return qemu_co_queue_do_restart(queue, true);
-}
-
-void coroutine_fn qemu_co_queue_restart_all(CoQueue *queue)
-{
-    assert(qemu_in_coroutine());
-    qemu_co_queue_do_restart(queue, false);
-}
-
-bool qemu_co_enter_next(CoQueue *queue)
-{
-    Coroutine *next;
-
-    next = QTAILQ_FIRST(&queue->entries);
-    if (!next) {
-        return false;
-    }
-
-    QTAILQ_REMOVE(&queue->entries, next, co_queue_next);
-    qemu_coroutine_enter(next, NULL);
-    return true;
-}
-
-bool qemu_co_queue_empty(CoQueue *queue)
-{
-    return QTAILQ_FIRST(&queue->entries) == NULL;
-}
-
-void qemu_co_mutex_init(CoMutex *mutex)
-{
-    memset(mutex, 0, sizeof(*mutex));
-    qemu_co_queue_init(&mutex->queue);
-}
-
-void coroutine_fn qemu_co_mutex_lock(CoMutex *mutex)
-{
-    Coroutine *self = qemu_coroutine_self();
-
-    trace_qemu_co_mutex_lock_entry(mutex, self);
-
-    while (mutex->locked) {
-        qemu_co_queue_wait(&mutex->queue);
-    }
-
-    mutex->locked = true;
-
-    trace_qemu_co_mutex_lock_return(mutex, self);
-}
-
-void coroutine_fn qemu_co_mutex_unlock(CoMutex *mutex)
-{
-    Coroutine *self = qemu_coroutine_self();
-
-    trace_qemu_co_mutex_unlock_entry(mutex, self);
-
-    assert(mutex->locked == true);
-    assert(qemu_in_coroutine());
-
-    mutex->locked = false;
-    qemu_co_queue_next(&mutex->queue);
-
-    trace_qemu_co_mutex_unlock_return(mutex, self);
-}
-
-void qemu_co_rwlock_init(CoRwlock *lock)
-{
-    memset(lock, 0, sizeof(*lock));
-    qemu_co_queue_init(&lock->queue);
-}
-
-void qemu_co_rwlock_rdlock(CoRwlock *lock)
-{
-    while (lock->writer) {
-        qemu_co_queue_wait(&lock->queue);
-    }
-    lock->reader++;
-}
-
-void qemu_co_rwlock_unlock(CoRwlock *lock)
-{
-    assert(qemu_in_coroutine());
-    if (lock->writer) {
-        lock->writer = false;
-        qemu_co_queue_restart_all(&lock->queue);
-    } else {
-        lock->reader--;
-        assert(lock->reader >= 0);
-        /* Wakeup only one waiting writer */
-        if (!lock->reader) {
-            qemu_co_queue_next(&lock->queue);
-        }
-    }
-}
-
-void qemu_co_rwlock_wrlock(CoRwlock *lock)
-{
-    while (lock->writer || lock->reader) {
-        qemu_co_queue_wait(&lock->queue);
-    }
-    lock->writer = true;
-}