iothread.h (1759B)
1 /* 2 * Event loop thread 3 * 4 * Copyright Red Hat Inc., 2013 5 * 6 * Authors: 7 * Stefan Hajnoczi <stefanha@redhat.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2 or later. 10 * See the COPYING file in the top-level directory. 11 * 12 */ 13 14 #ifndef IOTHREAD_H 15 #define IOTHREAD_H 16 17 #include "block/aio.h" 18 #include "qemu/thread.h" 19 #include "qom/object.h" 20 #include "sysemu/event-loop-base.h" 21 22 #define TYPE_IOTHREAD "iothread" 23 24 struct IOThread { 25 EventLoopBase parent_obj; 26 27 QemuThread thread; 28 AioContext *ctx; 29 bool run_gcontext; /* whether we should run gcontext */ 30 GMainContext *worker_context; 31 GMainLoop *main_loop; 32 QemuSemaphore init_done_sem; /* is thread init done? */ 33 bool stopping; /* has iothread_stop() been called? */ 34 bool running; /* should iothread_run() continue? */ 35 int thread_id; 36 37 /* AioContext poll parameters */ 38 int64_t poll_max_ns; 39 int64_t poll_grow; 40 int64_t poll_shrink; 41 }; 42 typedef struct IOThread IOThread; 43 44 DECLARE_INSTANCE_CHECKER(IOThread, IOTHREAD, 45 TYPE_IOTHREAD) 46 47 char *iothread_get_id(IOThread *iothread); 48 IOThread *iothread_by_id(const char *id); 49 AioContext *iothread_get_aio_context(IOThread *iothread); 50 GMainContext *iothread_get_g_main_context(IOThread *iothread); 51 52 /* 53 * Helpers used to allocate iothreads for internal use. These 54 * iothreads will not be seen by monitor clients when query using 55 * "query-iothreads". 56 */ 57 IOThread *iothread_create(const char *id, Error **errp); 58 void iothread_stop(IOThread *iothread); 59 void iothread_destroy(IOThread *iothread); 60 61 /* 62 * Returns true if executing withing IOThread context, 63 * false otherwise. 64 */ 65 bool qemu_in_iothread(void); 66 67 #endif /* IOTHREAD_H */