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pool->mutex = { { 0, 0, 0, 0, 0, {  0 } } };

The preceding line gives the error: "expected expression before { token".

Now, what I'm guessing is that the compiler version I'm using doesn't like the way this code creates a pointer to an array. It's not my code, though, so how do I change this so it compiles but acts the same as the preceding? I'm thinking something like

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pool->mutex = & ( {0, 0, 0, 0, 0, { 0 } } );

, but I'm not entirely sure that will work.

You can only set a struct that way on initialization, so while

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pthread_mutex_t mymutex = { { 0, 0, 0, 0, 0, {  0 } } };

is valid,

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pthread_mutex_t mymutex;
mymutex = { { 0, 0, 0, 0, 0, {  0 } } };

is not.
A way around this limitation would be to do something like this:

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pthread_mutex_t mymutex;
pthread_mutex_t tmpMutex = { { 0, 0, 0, 0, 0, {  0 } } };
mymutex = tmpMutex;

but if you are, in fact, using a pthread mutex then you really shouldn't get into the habit of assigning the value of one pthread_mutex_t to another (probably won't hurt with the initializer value, but others could lead to some unfortunate and hard-to-debug problems). In that case, it's probably better to use pthread_mutex_init:

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pthread_mutex_t mymutex;
pthread_mutex_init(&mymutex,NULL);

It works!

ilu

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