CZMQ Manual - CZMQ/3.0.1
zactor - simple actor framework
// Actors get a pipe and arguments from caller typedef void (zactor_fn) ( zsock_t *pipe, void *args); // Create a new actor passing arbitrary arguments reference. CZMQ_EXPORT zactor_t * zactor_new (zactor_fn task, void *args); // Destroy an actor. CZMQ_EXPORT void zactor_destroy (zactor_t **self_p); // Send a zmsg message to the actor, take ownership of the message // and destroy when it has been sent. CZMQ_EXPORT int zactor_send (zactor_t *self, zmsg_t **msg_p); // Receive a zmsg message from the actor. Returns NULL if the actor // was interrupted before the message could be received, or if there // was a timeout on the actor. // The caller is responsible for destroying the return value when finished with it. CZMQ_EXPORT zmsg_t * zactor_recv (zactor_t *self); // Probe the supplied object, and report if it looks like a zactor_t. CZMQ_EXPORT bool zactor_is (void *self); // Probe the supplied reference. If it looks like a zactor_t instance, // return the underlying libzmq actor handle; else if it looks like // a libzmq actor handle, return the supplied value. CZMQ_EXPORT void * zactor_resolve (void *self); // Return the actor's zsock handle. Use this when you absolutely need // to work with the zsock instance rather than the actor. CZMQ_EXPORT zsock_t * zactor_sock (zactor_t *self); // Self test of this class. CZMQ_EXPORT void zactor_test (bool verbose);
The zactor class provides a simple actor framework. It replaces the CZMQ zthread class, which had a complex API that did not fit the CLASS standard. A CZMQ actor is implemented as a thread plus a PAIR-PAIR pipe. The constructor and destructor are always synchronized, so the caller can be sure all resources are created, and destroyed, when these calls complete. (This solves a major problem with zthread, that a caller could not be sure when a child thread had finished.)
A zactor_t instance acts like a zsock_t and you can pass it to any CZMQ method that would take a zsock_t argument, including methods in zframe, zmsg, zstr, and zpoller. (zloop somehow escaped and needs catching.)
An actor function MUST call zsock_signal (pipe) when initialized and MUST listen to pipe and exit on $TERM command.
Please add @discuss section in ../src/zactor.c.
From zactor_test method
zactor_t *actor = zactor_new (echo_actor, "Hello, World"); assert (actor); zstr_sendx (actor, "ECHO", "This is a string", NULL); char *string = zstr_recv (actor); assert (streq (string, "This is a string")); free (string); zactor_destroy (&actor);
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