Re: [PATCH v2] Make xmalloc and xrealloc thread-safe

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From: Nicolas Pitre

Subject: Re: [PATCH v2] Make xmalloc and xrealloc thread-safe

Date: Wednesday, April 7, 2010 - 7:47 am

On Wed, 7 Apr 2010, Shawn Pearce wrote:

quoted text> On Wed, Apr 7, 2010 at 6:17 AM, Nicolas Pitre <nico@fluxnic.net> wrote:
> > Yet, the memset() issue comes up only because pthread_t is meant to be
> > an opaque type.  The only information we would need here is the actual
> > thread ID as returned by gettid() on Linux or GetCurrentThreadId() on
> > Windows, and then the read_mutex_owner could be a simple atomically
> > modifiable integer.  But what about other pthread-capable non Linux
> > systems?
> 
> Indeed.  If Windows threads are atomic words, then actually you don't
> need that double mutex in the emulation layer, and can instead use the
> atomic word to determine ownership.  Which makes this entire debate
> somewhat moot, doesn't it?

Well, indeed.


Nicolas

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Messages in current thread:

[PATCH 1/2] Make xmalloc and xrealloc thread-safe, Fredrik Kuivinen, (Tue Mar 23, 10:31 am)

Re: [PATCH 1/2] Make xmalloc and xrealloc thread-safe, Shawn O. Pearce, (Tue Mar 23, 11:43 am)

Re: [PATCH 1/2] Make xmalloc and xrealloc thread-safe, Fredrik Kuivinen, (Tue Mar 23, 2:21 pm)

Re: [PATCH 1/2] Make xmalloc and xrealloc thread-safe, Nicolas Pitre, (Tue Mar 23, 4:50 pm)

Re: [PATCH 1/2] Make xmalloc and xrealloc thread-safe, Fredrik Kuivinen, (Wed Mar 24, 8:23 am)

Re: [PATCH 1/2] Make xmalloc and xrealloc thread-safe, Nicolas Pitre, (Wed Mar 24, 10:53 am)

Re: [PATCH 1/2] Make xmalloc and xrealloc thread-safe, Shawn Pearce, (Wed Mar 24, 11:22 am)

Re: [PATCH 1/2] Make xmalloc and xrealloc thread-safe, Junio C Hamano, (Wed Mar 24, 11:44 am)

Re: [PATCH 1/2] Make xmalloc and xrealloc thread-safe, Nicolas Pitre, (Wed Mar 24, 11:54 am)

Re: [PATCH 1/2] Make xmalloc and xrealloc thread-safe, Shawn Pearce, (Wed Mar 24, 12:57 pm)

[PATCH] Make xmalloc and xrealloc thread-safe, Nicolas Pitre, (Wed Mar 24, 1:22 pm)

Re: [PATCH] Make xmalloc and xrealloc thread-safe, Shawn O. Pearce, (Wed Mar 24, 1:28 pm)

Re: [PATCH] Make xmalloc and xrealloc thread-safe, Nicolas Pitre, (Wed Mar 24, 2:02 pm)

Re: [PATCH] Make xmalloc and xrealloc thread-safe, Junio C Hamano, (Wed Mar 24, 2:11 pm)

Re: [PATCH] Make xmalloc and xrealloc thread-safe, Junio C Hamano, (Wed Mar 24, 2:28 pm)

Re: [PATCH] Make xmalloc and xrealloc thread-safe, Fredrik Kuivinen, (Sat Mar 27, 6:26 am)

Re: [PATCH] Make xmalloc and xrealloc thread-safe, Nicolas Pitre, (Sat Mar 27, 11:59 am)

Re: [PATCH] Make xmalloc and xrealloc thread-safe, Fredrik Kuivinen, (Tue Mar 30, 11:57 pm)

[PATCH v2] Make xmalloc and xrealloc thread-safe, Nicolas Pitre, (Tue Apr 6, 7:57 pm)

Re: [PATCH v2] Make xmalloc and xrealloc thread-safe, Shawn O. Pearce, (Tue Apr 6, 8:16 pm)

Re: [PATCH v2] Make xmalloc and xrealloc thread-safe, Nicolas Pitre, (Tue Apr 6, 9:51 pm)

Re: [PATCH v2] Make xmalloc and xrealloc thread-safe, Junio C Hamano, (Tue Apr 6, 10:21 pm)

Re: [PATCH v2] Make xmalloc and xrealloc thread-safe, Shawn Pearce, (Wed Apr 7, 5:29 am)

Re: [PATCH v2] Make xmalloc and xrealloc thread-safe, Nicolas Pitre, (Wed Apr 7, 6:17 am)

Re: [PATCH v2] Make xmalloc and xrealloc thread-safe, Shawn Pearce, (Wed Apr 7, 7:30 am)

Re: [PATCH v2] Make xmalloc and xrealloc thread-safe, Fredrik Kuivinen, (Wed Apr 7, 7:45 am)

Re: [PATCH v2] Make xmalloc and xrealloc thread-safe, Nicolas Pitre, (Wed Apr 7, 7:47 am)

Re: [PATCH v2] Make xmalloc and xrealloc thread-safe, Nicolas Pitre, (Wed Apr 7, 8:08 am)

Re: [PATCH v2] Make xmalloc and xrealloc thread-safe, Sverre Rabbelier, (Wed Apr 7, 8:27 am)

Re: [PATCH v2] Make xmalloc and xrealloc thread-safe, Fredrik Kuivinen, (Wed Apr 7, 9:13 am)

Re: [PATCH v2] Make xmalloc and xrealloc thread-safe, Fredrik Kuivinen, (Wed Apr 7, 9:15 am)

Re: [PATCH v2] Make xmalloc and xrealloc thread-safe, Junio C Hamano, (Wed Apr 7, 9:17 am)

Re: [PATCH v2] Make xmalloc and xrealloc thread-safe, Erik Faye-Lund, (Wed Apr 7, 9:44 am)

Re: [PATCH v2] Make xmalloc and xrealloc thread-safe, Nicolas Pitre, (Wed Apr 7, 11:37 am)

Re: [PATCH v2] Make xmalloc and xrealloc thread-safe, Johannes Sixt, (Wed Apr 7, 11:49 am)

[PATCH] Thread-safe xmalloc and xrealloc needs a recursive ..., Johannes Sixt, (Thu Apr 8, 12:15 am)

Re: [PATCH] Thread-safe xmalloc and xrealloc needs a recur ..., Fredrik Kuivinen, (Thu Apr 8, 1:42 am)