1 /* 2 * Coroutine internals 3 * 4 * Copyright (c) 2011 Kevin Wolf <kwolf@redhat.com> 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 25 #ifndef QEMU_COROUTINE_INT_H 26 #define QEMU_COROUTINE_INT_H 27 28 #include "qemu/queue.h" 29 #include "qemu/coroutine.h" 30 31 typedef enum { 32 COROUTINE_YIELD = 1, 33 COROUTINE_TERMINATE = 2, 34 COROUTINE_ENTER = 3, 35 } CoroutineAction; 36 37 struct Coroutine { 38 CoroutineEntry *entry; 39 void *entry_arg; 40 Coroutine *caller; 41 QSLIST_ENTRY(Coroutine) pool_next; 42 43 /* Coroutines that should be woken up when we yield or terminate */ 44 QSIMPLEQ_HEAD(, Coroutine) co_queue_wakeup; 45 QSIMPLEQ_ENTRY(Coroutine) co_queue_next; 46 }; 47 48 Coroutine *qemu_coroutine_new(void); 49 void qemu_coroutine_delete(Coroutine *co); 50 CoroutineAction qemu_coroutine_switch(Coroutine *from, Coroutine *to, 51 CoroutineAction action); 52 void coroutine_fn qemu_co_queue_run_restart(Coroutine *co); 53 54 #endif 55