problem mutex-thread "Unlocking mutex owned by another thread ???"

[NaeiKinDus]

Hello, i'm trying to program a thread that would be locked (by a
mutex) and that would only be unlocked once that a function is done.
The purpose is to generate data, and unlock the mutex in order to
activate the thread once the data is generated.

step 1: initialize the mutex

mx (the mutex is part of the class "cl")

class Client
{
...

public:
pthread_mutex_t mx;

...
}

pthread_mutex_init(&cl->mx, NULL);

step 2:

as i'm calling a thread, i have to pass in param a structure :

struct S_PARAMS
{
...

pthread_mutex_t *mx;

...
} typedef T_PARAMS;

i create the thread and i copy the mutex in the param structure :

pthread_t thread;
params->mx = &cl->mx;

if ((thId = pthread_create(&thread, NULL, OBody::thFileSender, (void
*)params)) != 0)
{
THREAD NOT CREATED ... throw ...
}
else
{

}

 

[Jack Klein]

Hello, i'm trying to program a thread that would be locked (by a
mutex) and that would only be unlocked once that a function is done.
The purpose is to generate data, and unlock the mutex in order to
activate the thread once the data is generated.

This group discusses the standard C++ language, which does not define
either threads or mutexes.

[snip]

pthread_mutex_t mx;

pthreads are a system-specific extension and off-topic here.

You need to ask this question in a newsgroup that supports your
particular operating system. Or perhaps
Not in a language group.

--
Jack Klein
Home: http://JK-Technology.Com
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