worker.h

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/*
  Copyright 2012-2016 David Robillard <http://drobilla.net>
 
  Permission to use, copy, modify, and/or distribute this software for any
  purpose with or without fee is hereby granted, provided that the above
  copyright notice and this permission notice appear in all copies.
 
  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

 
#ifndef LV2_WORKER_H
#define LV2_WORKER_H
 
#include <stdint.h>
 
#include "lv2.h"
 
#define LV2_WORKER_URI    "http://lv2plug.in/ns/ext/worker"  
#define LV2_WORKER_PREFIX LV2_WORKER_URI "#"                 
 
#define LV2_WORKER__interface LV2_WORKER_PREFIX "interface"  
#define LV2_WORKER__schedule  LV2_WORKER_PREFIX "schedule"   
 
#ifdef __cplusplus
extern "C" {
#endif

typedef enum {
        LV2_WORKER_SUCCESS       = 0,  
        LV2_WORKER_ERR_UNKNOWN   = 1,  
        LV2_WORKER_ERR_NO_SPACE  = 2   
} LV2_Worker_Status;

typedef void* LV2_Worker_Respond_Handle;

typedef LV2_Worker_Status (*LV2_Worker_Respond_Function)(
        LV2_Worker_Respond_Handle handle,
        uint32_t                  size,
        const void*               data);

typedef struct _LV2_Worker_Interface {
        LV2_Worker_Status (*work)(LV2_Handle                  instance,
                                  LV2_Worker_Respond_Function respond,
                                  LV2_Worker_Respond_Handle   handle,
                                  uint32_t                    size,
                                  const void*                 data);

        LV2_Worker_Status (*work_response)(LV2_Handle  instance,
                                           uint32_t    size,
                                           const void* body);

        LV2_Worker_Status (*end_run)(LV2_Handle instance);
} LV2_Worker_Interface;

typedef void* LV2_Worker_Schedule_Handle;

typedef struct _LV2_Worker_Schedule {
        LV2_Worker_Schedule_Handle handle;

        LV2_Worker_Status (*schedule_work)(LV2_Worker_Schedule_Handle handle,
                                           uint32_t                   size,
                                           const void*                data);
} LV2_Worker_Schedule;
 
#ifdef __cplusplus
}  /* extern "C" */
#endif
 
#endif  /* LV2_WORKER_H */