iotests/129: Do not check @busy
[qemu.git] / include / qemu / coroutine_int.h
blob1da148552f74b542959dd48448eb6bbc3aead935
1 /*
2 * Coroutine internals
4 * Copyright (c) 2011 Kevin Wolf <kwolf@redhat.com>
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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.
25 #ifndef QEMU_COROUTINE_INT_H
26 #define QEMU_COROUTINE_INT_H
28 #include "qemu/queue.h"
29 #include "qemu/coroutine.h"
31 #ifdef CONFIG_SAFESTACK
32 /* Pointer to the unsafe stack, defined by the compiler */
33 extern __thread void *__safestack_unsafe_stack_ptr;
34 #endif
36 #define COROUTINE_STACK_SIZE (1 << 20)
38 typedef enum {
39 COROUTINE_YIELD = 1,
40 COROUTINE_TERMINATE = 2,
41 COROUTINE_ENTER = 3,
42 } CoroutineAction;
44 struct Coroutine {
45 CoroutineEntry *entry;
46 void *entry_arg;
47 Coroutine *caller;
49 /* Only used when the coroutine has terminated. */
50 QSLIST_ENTRY(Coroutine) pool_next;
52 size_t locks_held;
54 /* Only used when the coroutine has yielded. */
55 AioContext *ctx;
57 /* Used to catch and abort on illegal co-routine entry.
58 * Will contain the name of the function that had first
59 * scheduled the coroutine. */
60 const char *scheduled;
62 QSIMPLEQ_ENTRY(Coroutine) co_queue_next;
64 /* Coroutines that should be woken up when we yield or terminate.
65 * Only used when the coroutine is running.
67 QSIMPLEQ_HEAD(, Coroutine) co_queue_wakeup;
69 QSLIST_ENTRY(Coroutine) co_scheduled_next;
72 Coroutine *qemu_coroutine_new(void);
73 void qemu_coroutine_delete(Coroutine *co);
74 CoroutineAction qemu_coroutine_switch(Coroutine *from, Coroutine *to,
75 CoroutineAction action);
77 #endif