probs compiling with gcc + lpthread - High Level Programming

JamesGoh · #1 03-02-2008

Im trying to write a program atm which uses mutexes to control thread access to a certain code section ( the critical section).

However, whenever I compile the code using gcc I get the following message from gcc

Unresolved text symbol "pthread_mutex_lock"
Unresolved text symbol "pthread_mutex_unlock"

I initalise my mutex as follows, after including <pthread.h> in my code

Code:

pthread_mutex_init(&cs_mutex,NULL);

The critical section is accessed in the following way. Note that this code segment is generic as my threads perform the same functionality

Code:

pthread_mutex_lock(&cs_mutex);

/*
Do critical section stuff here

*/
pthread_mutex_unlock(&cs_mutex);

I have included the -lpthread (which is needed to support thread functionality in the program ) in the compiling command, so I cannot understand why my code is not compiling

JamesGoh · #2 03-02-2008

Hi guys

I found out what the problem was

I mis-spelt thread as thead (slaps himself over the head) in pthread_mutex_lock and pthread_mutex_unlock which was why the compiler couldn't identify it :P

ohh the joys of spelling mistakes

cheers

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