From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:46216) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RlgyO-0004pP-AI for qemu-devel@nongnu.org; Fri, 13 Jan 2012 08:15:16 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RlgyI-0007jX-BD for qemu-devel@nongnu.org; Fri, 13 Jan 2012 08:15:12 -0500 Received: from e06smtp16.uk.ibm.com ([195.75.94.112]:56459) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RlgyH-0007fk-De for qemu-devel@nongnu.org; Fri, 13 Jan 2012 08:15:05 -0500 Received: from /spool/local by e06smtp16.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 13 Jan 2012 13:14:59 -0000 Received: from d06av08.portsmouth.uk.ibm.com (d06av08.portsmouth.uk.ibm.com [9.149.37.249]) by d06nrmr1307.portsmouth.uk.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q0DDERbO2355400 for ; Fri, 13 Jan 2012 13:14:27 GMT Received: from d06av08.portsmouth.uk.ibm.com (loopback [127.0.0.1]) by d06av08.portsmouth.uk.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q0DDEQK1010820 for ; Fri, 13 Jan 2012 13:14:27 GMT From: Stefan Hajnoczi Date: Fri, 13 Jan 2012 13:14:03 +0000 Message-Id: <1326460457-19446-2-git-send-email-stefanha@linux.vnet.ibm.com> In-Reply-To: <1326460457-19446-1-git-send-email-stefanha@linux.vnet.ibm.com> References: <1326460457-19446-1-git-send-email-stefanha@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH v5 01/15] coroutine: add co_sleep_ns() coroutine sleep function List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Kevin Wolf , Marcelo Tosatti , Stefan Hajnoczi , Luiz Capitulino Signed-off-by: Stefan Hajnoczi --- Makefile.objs | 1 + qemu-coroutine-sleep.c | 38 ++++++++++++++++++++++++++++++++++++++ qemu-coroutine.h | 9 +++++++++ 3 files changed, 48 insertions(+), 0 deletions(-) create mode 100644 qemu-coroutine-sleep.c diff --git a/Makefile.objs b/Makefile.objs index 4f6d26c..f4f52e0 100644 --- a/Makefile.objs +++ b/Makefile.objs @@ -13,6 +13,7 @@ oslib-obj-$(CONFIG_POSIX) += oslib-posix.o qemu-thread-posix.o ####################################################################### # coroutines coroutine-obj-y = qemu-coroutine.o qemu-coroutine-lock.o qemu-coroutine-io.o +coroutine-obj-y += qemu-coroutine-sleep.o ifeq ($(CONFIG_UCONTEXT_COROUTINE),y) coroutine-obj-$(CONFIG_POSIX) += coroutine-ucontext.o else diff --git a/qemu-coroutine-sleep.c b/qemu-coroutine-sleep.c new file mode 100644 index 0000000..fd65274 --- /dev/null +++ b/qemu-coroutine-sleep.c @@ -0,0 +1,38 @@ +/* + * QEMU coroutine sleep + * + * Copyright IBM, Corp. 2011 + * + * Authors: + * Stefan Hajnoczi + * + * 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 "qemu-coroutine.h" +#include "qemu-timer.h" + +typedef struct CoSleepCB { + QEMUTimer *ts; + Coroutine *co; +} CoSleepCB; + +static void co_sleep_cb(void *opaque) +{ + CoSleepCB *sleep_cb = opaque; + + qemu_free_timer(sleep_cb->ts); + qemu_coroutine_enter(sleep_cb->co, NULL); +} + +void coroutine_fn co_sleep_ns(QEMUClock *clock, int64_t ns) +{ + CoSleepCB sleep_cb = { + .co = qemu_coroutine_self(), + }; + sleep_cb.ts = qemu_new_timer(clock, SCALE_NS, co_sleep_cb, &sleep_cb); + qemu_mod_timer(sleep_cb.ts, qemu_get_clock_ns(clock) + ns); + qemu_coroutine_yield(); +} diff --git a/qemu-coroutine.h b/qemu-coroutine.h index 8a55fe1..34c15d4 100644 --- a/qemu-coroutine.h +++ b/qemu-coroutine.h @@ -17,6 +17,7 @@ #include #include "qemu-queue.h" +#include "qemu-timer.h" /** * Coroutines are a mechanism for stack switching and can be used for @@ -199,4 +200,12 @@ void qemu_co_rwlock_wrlock(CoRwlock *lock); */ void qemu_co_rwlock_unlock(CoRwlock *lock); +/** + * Yield the coroutine for a given duration + * + * Note this function uses timers and hence only works when a main loop is in + * use. See main-loop.h and do not use from qemu-tool programs. + */ +void coroutine_fn co_sleep_ns(QEMUClock *clock, int64_t ns); + #endif /* QEMU_COROUTINE_H */ -- 1.7.7.3