Re: [uClinux-dev] Re: [uClibc]POSIX threading support
From: Gagamel (gagamel88@hanmail.net)
Date: Wed Feb 27 2002 - 11:30:41 EST
Hello-
I'm working in (ARM7TDMI + uClinux-2.4.x + uClibc).
A few days ago, I looked your (Erik) words about "POSIX threading support".
In these days, as I had some hard time because of the thread library,
after looking your words, I immediately added it on my works.
In the result, test programs (ex1 ~ ex7) worked well.
But my program had a problem.
(I tested my program on x86. There was no problem.)
My program uses a macro, PTHERAD_MUTEX_INITIALIZER (in pthread.h)
to init a mutex --- not pthread_mutex_init ( ).
When I execute my app, the error occurred.
The pthread_mutex_lock() / pthread_mutex_unlock() return errors.
So, I looked around pthread_mutex_init() & pthread_mutex_lock()
in (CVS)/uClibc/libpthread/linuxthreads/mutex.c.
pthread_mutex_init () initialize as FAST_NP,
and pthread_mutex_lock() supports only FAST_NP, RECURSIVE_NP,ERRORCHECK_NP.
BTW in the pthread.h <- (CVS)/include/pthread.h ,
mutex init macro(PTHERAD_MUTEX_INITIALIZER) set the value as TIMED_NP.
I guessed you used linuxthread-2.1.2 (from glibc),
so I looked original pthread.h in linuxthread-2.1.2.
But their pthread.h was different from yours.
In original pthread.h, PTHERAD_MUTEX_INITIALIZER set FAST_NP.
So, I tried original pthread.h on your pthread c sources.
Although lock/unlock funcions didn't return errors,
the result was not so good compared with x86's
Erik, am I wrong? What do you think about ?
I'm not aware of linuxthread well.
So please explain about it .
=============================================================================
"우리 인터넷, Daum" http://www.daum.net
- Daum회원을 위한 인터넷쇼핑 + 파워 공동구매 ☞ 쇼핑 둘러보기
- Daum이 제공하는 100% 맞춤 광고 서비스 ☞ 검색 키워드샵
|
This message resent by the uclinux-dev@uclinux.org list server http://www.uClinux.org/
This archive was generated by hypermail 2.1.4
: Thu Sep 19 2002 - 13:20:55 EDT
