diff options
| -rw-r--r-- | backend.c | 10 | ||||
| -rw-r--r-- | midimonster.h | 9 |
2 files changed, 15 insertions, 4 deletions
@@ -251,8 +251,16 @@ int mm_backend_register(backend b){ int backends_start(){ int rv = 0, current; - size_t u; + size_t u, p; for(u = 0; u < nbackends; u++){ + //only start backends that have instances + for(p = 0; p < ninstances && instances[p]->backend != backends + u; p++){ + } + if(p == ninstances){ + fprintf(stderr, "Skipping start of backend %s\n", backends[u].name); + continue; + } + current = backends[u].start(); if(current){ fprintf(stderr, "Failed to start backend %s\n", backends[u].name); diff --git a/midimonster.h b/midimonster.h index 98d8459..a3e5e1f 100644 --- a/midimonster.h +++ b/midimonster.h @@ -29,7 +29,7 @@ struct _managed_fd; * * int init() * The only function that should be exported by the shared object. * Called when the shared object is attached. Should register - * a backend structure with the core. + * a backend structure containing callable entry points with the core. * Returning anything other than zero causes midimonster to fail the * startup checks. * * mmbackend_configure @@ -46,7 +46,8 @@ struct _managed_fd; * out-of-memory condition and terminates the program. * * mmbackend_start * Called after all instances have been created and all mappings - * have been set up. May be used to connect to backing hardware + * have been set up. Only backends for which instances have been configured + * receive the start call. May be used to connect to backing hardware * or to update runtime-specific data in the various data structures. * Returning a non-zero value signals an error starting the backend * and stops further progress. @@ -68,7 +69,9 @@ struct _managed_fd; * Return the maximum sleep interval for this backend in milliseconds. * If not implemented, a maximum interval of one second is used. * * mmbackend_shutdown - * Clean up all allocations, finalize all hardware connections. + * Clean up all allocations, finalize all hardware connections. All registered + * backends receive the shutdown call, regardless of whether they have been + * started previously. * Return value is currently ignored. */ typedef int (*mmbackend_handle_event)(struct _backend_instance* inst, size_t channels, struct _backend_channel** c, struct _channel_value* v); |