int msIO_installHandlers( msIOContext *stdin_context,
msIOContext *stdout_context,
msIOContext *stderr_context )
{
msIOContextGroup *group;
msIO_Initialize();
group = msIO_GetContextGroup();
if( stdin_context == NULL )
group->stdin_context = default_contexts.stdin_context;
else if( stdin_context != &group->stdin_context )
group->stdin_context = *stdin_context;
if( stdout_context == NULL )
group->stdout_context = default_contexts.stdout_context;
else if( stdout_context != &group->stdout_context )
group->stdout_context = *stdout_context;
if( stderr_context == NULL )
group->stderr_context = default_contexts.stderr_context;
else if( stderr_context != &group->stderr_context )
group->stderr_context = *stderr_context;
return MS_TRUE;
}
static msIOContextGroup *msIO_GetContextGroup()
{
int nThreadId = msGetThreadId();
msIOContextGroup *prev = NULL, *group = io_context_list;
if( group != NULL && group->thread_id == nThreadId )
return group;
/* -------------------------------------------------------------------- */
/* Search for group for this thread */
/* -------------------------------------------------------------------- */
msAcquireLock( TLOCK_IOCONTEXT );
msIO_Initialize();
group = io_context_list;
while( group != NULL && group->thread_id != nThreadId )
{
prev = group;
group = group->next;
}
/* -------------------------------------------------------------------- */
/* If we found it, make sure it is pushed to the front of the */
/* link for faster finding next time, and return it. */
/* -------------------------------------------------------------------- */
if( group != NULL )
{
if( prev != NULL )
{
prev->next = group->next;
group->next = io_context_list;
io_context_list = group;
}
msReleaseLock( TLOCK_IOCONTEXT );
return group;
}
/* -------------------------------------------------------------------- */
/* Create a new context group for this thread. */
/* -------------------------------------------------------------------- */
group = (msIOContextGroup *) calloc(sizeof(msIOContextGroup),1);
group->stdin_context = default_contexts.stdin_context;
group->stdout_context = default_contexts.stdout_context;
group->stderr_context = default_contexts.stderr_context;
group->thread_id = nThreadId;
group->next = io_context_list;
io_context_list = group;
msReleaseLock( TLOCK_IOCONTEXT );
return group;
}
msIOContext *msIO_getHandler( FILE * fp )
{
int nThreadId = msGetThreadId();
msIOContextGroup *group = io_context_list;
msIO_Initialize();
if( group == NULL || group->thread_id != nThreadId ) {
group = msIO_GetContextGroup();
if( group == NULL )
return NULL;
}
if( fp == stdin || fp == NULL || strcmp((const char *)fp,"stdin") == 0 )
return &(group->stdin_context);
else if( fp == stdout || strcmp((const char *)fp,"stdout") == 0 )
return &(group->stdout_context);
else if( fp == stderr || strcmp((const char *)fp,"stderr") == 0 )
return &(group->stderr_context);
else
return NULL;
}
