The 'global' space handle. This is the default space handle implied if no spaces are explicitly created.
Enumeration Type Documentation
enum globus_callback_space_behavior_t
Callback space behaviors describe how a space behaves. In a non-threaded build all spaces exhibit a behavior == _BEHAVIOR_SINGLE. Setting a specific behavior in this case is ignored.
In a threaded build, _BEHAVIOR_SINGLE retains all the rules and behaviors of a non-threaded build while _BEHAVIOR_THREADED makes the space act as the global space.
Setting a space's behavior to _BEHAVIOR_SINGLE guarantees that the poll protection will always be there and all callbacks are serialized and only kicked out when polled for. In a threaded build, it is still necessary to poll for callbacks in a _BEHAVIOR_SINGLE space. (globus_cond_wait() will take care of this for you also)
Setting a space's behavior to _BEHAVIOR_SERIALIZED guarantees that the poll protection will always be there and all callbacks are serialized. In a threaded build, it is NOT necessary to poll for callbacks in a _BEHAVIOR_SERIALIZED space. Callbacks in this space will be delivered as soon as possible, but only one outstanding (and unblocked) callback will be allowed at any time.
Setting a space's behavior to _BEHAVIOR_THREADED allows the user to have the poll protection provided by spaces when built non-threaded, yet, be fully threaded when built threaded (where poll protection is not needed)
Enumerator:
GLOBUS_CALLBACK_SPACE_BEHAVIOR_SINGLE
The default behavior. Indicates that you always want poll protection and single threaded behavior (callbacks need to be explicitly polled for
GLOBUS_CALLBACK_SPACE_BEHAVIOR_SERIALIZED
Indicates that you want poll protection and all callbacks to be serialized (but they do not need to be polled for in a threaded build).
Initialize a user space. This creates a user space.
Parameters:
space storage for the initialized space handle. This must be destroyed with globus_callback_space_destroy() attr a space attr descibing desired behaviors. If GLOBUS_NULL, the default behavior of GLOBUS_CALLBACK_SPACE_BEHAVIOR_SINGLE is assumed. This attr is copied into the space, so it is acceptable to destroy the attr as soon as it is no longer needed
Returns:
•
GLOBUS_CALLBACK_ERROR_INVALID_ARGUMENT on NULL space
Take a reference to a space. A library which has been 'given' a space to provide callbacks on would use this to take a reference on the user's space. This prevents mayhem should a user destroy a space before the library is done with it. This reference should be destroyed with globus_callback_space_destroy() (think dup())
Destroy a reference to a user space. This will destroy a reference to a previously initialized space. Space will not actually be destroyed until all callbacks registered with this space have been run and unregistered (if the user has a handle to that callback) AND all references (from globus_callback_space_reference()) have been destroyed.
Parameters:
space space to destroy, previously initialized by globus_callback_space_init() or referenced with globus_callback_space_reference()
Initialize a space attr. Currently, the only attr to set is the behavior. The default behavior associated with this attr is GLOBUS_CALLBACK_SPACE_BEHAVIOR_SINGLE
Parameters:
attr storage for the intialized attr. Must be destroyed with globus_callback_space_attr_destroy()
Returns:
•
GLOBUS_CALLBACK_ERROR_INVALID_ARGUMENT on NULL attr
Get the behavior associated with an attr. Note: for a non-threaded build, this will always pass back a behavior == GLOBUS_CALLBACK_SPACE_BEHAVIOR_SINGLE.
Parameters:
attr attr on which to query behavior
behavior storage for the behavior