[07/10] coroutine: split qemu-coroutine-lock.c

queues are not just internal things for locks, split them.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
---
 Makefile.objs          |    2 +-
 qemu-coroutine-lock.c  |   49 +------------------------------
 qemu-coroutine-queue.c |   76 ++++++++++++++++++++++++++++++++++++++++++++++++
 trace-events           |    4 ++-
 4 files changed, 81 insertions(+), 50 deletions(-)
 create mode 100644 qemu-coroutine-queue.c

Il 03/04/2012 10:38, Lai Jiangshan ha scritto:
> queues are not just internal things for locks, split them.
> 
> Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
> ---
>  Makefile.objs          |    2 +-
>  qemu-coroutine-lock.c  |   49 +------------------------------
>  qemu-coroutine-queue.c |   76 ++++++++++++++++++++++++++++++++++++++++++++++++
>  trace-events           |    4 ++-
>  4 files changed, 81 insertions(+), 50 deletions(-)
>  create mode 100644 qemu-coroutine-queue.c
> 
> diff --git a/Makefile.objs b/Makefile.objs
> index 226b01d..1f0cc31 100644
> --- a/Makefile.objs
> +++ b/Makefile.objs
> @@ -27,7 +27,7 @@ oslib-obj-$(CONFIG_POSIX) += oslib-posix.o qemu-thread-posix.o
>  #######################################################################
>  # coroutines
>  coroutine-obj-y = qemu-coroutine.o qemu-coroutine-lock.o qemu-coroutine-io.o
> -coroutine-obj-y += qemu-coroutine-sleep.o
> +coroutine-obj-y += qemu-coroutine-sleep.o qemu-coroutine-queue.o
>  ifeq ($(CONFIG_UCONTEXT_COROUTINE),y)
>  coroutine-obj-$(CONFIG_POSIX) += coroutine-ucontext.o
>  else
> diff --git a/qemu-coroutine-lock.c b/qemu-coroutine-lock.c
> index 159d66d..2bfbd41 100644
> --- a/qemu-coroutine-lock.c
> +++ b/qemu-coroutine-lock.c
> @@ -1,5 +1,5 @@
>  /*
> - * coroutine queues and locks
> + * coroutine locks
>   *
>   * Copyright (c) 2011 Kevin Wolf <kwolf@redhat.com>
>   *
> @@ -28,53 +28,6 @@
>  #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());
> -}
> -
> -void coroutine_fn qemu_co_queue_wait_insert_head(CoQueue *queue)
> -{
> -    Coroutine *self = qemu_coroutine_self();
> -    QTAILQ_INSERT_HEAD(&queue->entries, self, co_queue_next);
> -    qemu_coroutine_yield();
> -    assert(qemu_in_coroutine());
> -}
> -
> -bool qemu_co_queue_next(CoQueue *queue)
> -{
> -    Coroutine *next;
> -
> -    next = QTAILQ_FIRST(&queue->entries);
> -    if (next) {
> -        QTAILQ_REMOVE(&queue->entries, next, co_queue_next);
> -        trace_qemu_co_queue_next(next);
> -        qemu_co_runnable_schedule(next);
> -    }
> -
> -    return (next != NULL);
> -}
> -
> -void qemu_co_queue_restart_all(CoQueue *queue)
> -{
> -    while (qemu_co_queue_next(queue)) {
> -        /* Do nothing */
> -    }
> -}
> -
> -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));
> diff --git a/qemu-coroutine-queue.c b/qemu-coroutine-queue.c
> new file mode 100644
> index 0000000..b90818d
> --- /dev/null
> +++ b/qemu-coroutine-queue.c
> @@ -0,0 +1,76 @@
> +/*
> + * coroutine queues
> + *
> + * 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 "qemu-coroutine.h"
> +#include "qemu-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());
> +}
> +
> +void coroutine_fn qemu_co_queue_wait_insert_head(CoQueue *queue)
> +{
> +    Coroutine *self = qemu_coroutine_self();
> +    QTAILQ_INSERT_HEAD(&queue->entries, self, co_queue_next);
> +    qemu_coroutine_yield();
> +    assert(qemu_in_coroutine());
> +}
> +
> +bool qemu_co_queue_next(CoQueue *queue)
> +{
> +    Coroutine *next;
> +
> +    next = QTAILQ_FIRST(&queue->entries);
> +    if (next) {
> +        QTAILQ_REMOVE(&queue->entries, next, co_queue_next);
> +        trace_qemu_co_queue_next(next);
> +        qemu_co_runnable_schedule(next);
> +    }
> +
> +    return (next != NULL);
> +}
> +
> +void qemu_co_queue_restart_all(CoQueue *queue)
> +{
> +    while (qemu_co_queue_next(queue)) {
> +        /* Do nothing */
> +    }
> +}
> +
> +bool qemu_co_queue_empty(CoQueue *queue)
> +{
> +    return (QTAILQ_FIRST(&queue->entries) == NULL);
> +}
> diff --git a/trace-events b/trace-events
> index 39b9c84..b35e8de 100644
> --- a/trace-events
> +++ b/trace-events
> @@ -561,8 +561,10 @@ qemu_coroutine_enter(void *from, void *to, void *opaque) "from %p to %p opaque %
>  qemu_coroutine_yield(void *from, void *to) "from %p to %p"
>  qemu_coroutine_terminate(void *co) "self %p"
>  
> -# qemu-coroutine-lock.c
> +# qemu-coroutine-queue.c
>  qemu_co_queue_next(void *next) "next %p"
> +
> +# qemu-coroutine-lock.c
>  qemu_co_mutex_lock_entry(void *mutex, void *self) "mutex %p self %p"
>  qemu_co_mutex_lock_return(void *mutex, void *self) "mutex %p self %p"
>  qemu_co_mutex_unlock_entry(void *mutex, void *self) "mutex %p self %p"

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>

... and you could move the runnable bits to the new file too.

Paolo

Am 03.04.2012 10:38, schrieb Lai Jiangshan:
> queues are not just internal things for locks, split them.
> 
> Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
> ---
>  Makefile.objs          |    2 +-
>  qemu-coroutine-lock.c  |   49 +------------------------------
>  qemu-coroutine-queue.c |   76 ++++++++++++++++++++++++++++++++++++++++++++++++
>  trace-events           |    4 ++-
>  4 files changed, 81 insertions(+), 50 deletions(-)

What's the point? qemu-coroutine-lock.c is already a small file (171
lines) and all functions in it are doing related things (they
synchronise coroutines). Splitting a small cohesive file into two tiny
halves isn't an improvement, IMO.

Kevin