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Re: [Qemu-devel] [PATCH v3 01/10] Introduce qemu_cond_timedwait for POSI
From: |
Jan Kiszka |
Subject: |
Re: [Qemu-devel] [PATCH v3 01/10] Introduce qemu_cond_timedwait for POSIX |
Date: |
Thu, 05 Apr 2012 13:56:43 +0200 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
On 2012-04-05 13:19, Peter Maydell wrote:
> On 5 April 2012 11:59, Jan Kiszka <address@hidden> wrote:
>> +/* Returns true if condition was signals, false if timed out. */
>> +bool qemu_cond_timedwait(QemuCond *cond, QemuMutex *mutex,
>> + unsigned int timeout_ms)
>> +{
>> + struct timespec ts;
>> + struct timeval tv;
>> + int err;
>> +
>> + gettimeofday(&tv, NULL);
>> + ts.tv_sec = tv.tv_sec + timeout_ms / 1000;
>> + ts.tv_nsec = tv.tv_usec * 1000 + timeout_ms % 1000;
>> + if (ts.tv_nsec > 1000000000) {
>> + ts.tv_sec++;
>> + ts.tv_nsec -= 1000000000;
>> + }
>> + err = pthread_cond_timedwait(&cond->cond, &mutex->lock, &ts);
>
> Use clock_gettime() and avoid the need to convert a struct timeval
> to a struct timespec ?
Would save that "* 1000". I just wondered why we do not use it elsewhere
in QEMU and was reluctant to risk some BSD breakage.
Jan
--
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux
- [Qemu-devel] [PATCH v3 00/10] Use more central threading and synchronization services, Jan Kiszka, 2012/04/05
- [Qemu-devel] [PATCH v3 01/10] Introduce qemu_cond_timedwait for POSIX, Jan Kiszka, 2012/04/05
- Re: [Qemu-devel] [PATCH v3 01/10] Introduce qemu_cond_timedwait for POSIX, Peter Maydell, 2012/04/05
- Re: [Qemu-devel] [PATCH v3 01/10] Introduce qemu_cond_timedwait for POSIX,
Jan Kiszka <=
- Re: [Qemu-devel] [PATCH v3 01/10] Introduce qemu_cond_timedwait for POSIX, Peter Maydell, 2012/04/05
- Re: [Qemu-devel] [PATCH v3 01/10] Introduce qemu_cond_timedwait for POSIX, malc, 2012/04/05
- Re: [Qemu-devel] [PATCH v3 01/10] Introduce qemu_cond_timedwait for POSIX, Paolo Bonzini, 2012/04/05
- Re: [Qemu-devel] [PATCH v3 01/10] Introduce qemu_cond_timedwait for POSIX, malc, 2012/04/05
- Re: [Qemu-devel] [PATCH v3 01/10] Introduce qemu_cond_timedwait for POSIX, Paolo Bonzini, 2012/04/05
- Re: [Qemu-devel] [PATCH v3 01/10] Introduce qemu_cond_timedwait for POSIX, Jan Kiszka, 2012/04/05
- Re: [Qemu-devel] [PATCH v3 01/10] Introduce qemu_cond_timedwait for POSIX, malc, 2012/04/05
- Re: [Qemu-devel] [PATCH v3 01/10] Introduce qemu_cond_timedwait for POSIX, Jan Kiszka, 2012/04/05
- Re: [Qemu-devel] [PATCH v3 01/10] Introduce qemu_cond_timedwait for POSIX, malc, 2012/04/05
- Re: [Qemu-devel] [PATCH v3 01/10] Introduce qemu_cond_timedwait for POSIX, Jan Kiszka, 2012/04/05