1#ifndef QEMU_THREAD_H
2#define QEMU_THREAD_H
3
4#include "qemu/processor.h"
5#include "qemu/atomic.h"
6
7typedef struct QemuCond QemuCond;
8typedef struct QemuSemaphore QemuSemaphore;
9typedef struct QemuEvent QemuEvent;
10typedef struct QemuLockCnt QemuLockCnt;
11typedef struct QemuThread QemuThread;
12
13#ifdef _WIN32
14#include "qemu/thread-win32.h"
15#else
16#include "qemu/thread-posix.h"
17#endif
18
19
20#include "qemu/qsp.h"
21
22#define QEMU_THREAD_JOINABLE 0
23#define QEMU_THREAD_DETACHED 1
24
25void qemu_mutex_init(QemuMutex *mutex);
26void qemu_mutex_destroy(QemuMutex *mutex);
27int qemu_mutex_trylock_impl(QemuMutex *mutex, const char *file, const int line);
28void qemu_mutex_lock_impl(QemuMutex *mutex, const char *file, const int line);
29void qemu_mutex_unlock_impl(QemuMutex *mutex, const char *file, const int line);
30
31typedef void (*QemuMutexLockFunc)(QemuMutex *m, const char *f, int l);
32typedef int (*QemuMutexTrylockFunc)(QemuMutex *m, const char *f, int l);
33typedef void (*QemuRecMutexLockFunc)(QemuRecMutex *m, const char *f, int l);
34typedef int (*QemuRecMutexTrylockFunc)(QemuRecMutex *m, const char *f, int l);
35typedef void (*QemuCondWaitFunc)(QemuCond *c, QemuMutex *m, const char *f,
36 int l);
37
38extern QemuMutexLockFunc qemu_bql_mutex_lock_func;
39extern QemuMutexLockFunc qemu_mutex_lock_func;
40extern QemuMutexTrylockFunc qemu_mutex_trylock_func;
41extern QemuRecMutexLockFunc qemu_rec_mutex_lock_func;
42extern QemuRecMutexTrylockFunc qemu_rec_mutex_trylock_func;
43extern QemuCondWaitFunc qemu_cond_wait_func;
44
45
46#define qemu_mutex_lock__raw(m) \
47 qemu_mutex_lock_impl(m, __FILE__, __LINE__)
48#define qemu_mutex_trylock__raw(m) \
49 qemu_mutex_trylock_impl(m, __FILE__, __LINE__)
50
51#ifdef __COVERITY__
52
53
54
55
56#define qemu_mutex_lock(m) \
57 qemu_mutex_lock_impl(m, __FILE__, __LINE__);
58#define qemu_mutex_trylock(m) \
59 qemu_mutex_trylock_impl(m, __FILE__, __LINE__);
60#define qemu_rec_mutex_lock(m) \
61 qemu_rec_mutex_lock_impl(m, __FILE__, __LINE__);
62#define qemu_rec_mutex_trylock(m) \
63 qemu_rec_mutex_trylock_impl(m, __FILE__, __LINE__);
64#define qemu_cond_wait(c, m) \
65 qemu_cond_wait_impl(c, m, __FILE__, __LINE__);
66#else
67#define qemu_mutex_lock(m) ({ \
68 QemuMutexLockFunc _f = atomic_read(&qemu_mutex_lock_func); \
69 _f(m, __FILE__, __LINE__); \
70 })
71
72#define qemu_mutex_trylock(m) ({ \
73 QemuMutexTrylockFunc _f = atomic_read(&qemu_mutex_trylock_func); \
74 _f(m, __FILE__, __LINE__); \
75 })
76
77#define qemu_rec_mutex_lock(m) ({ \
78 QemuRecMutexLockFunc _f = atomic_read(&qemu_rec_mutex_lock_func); \
79 _f(m, __FILE__, __LINE__); \
80 })
81
82#define qemu_rec_mutex_trylock(m) ({ \
83 QemuRecMutexTrylockFunc _f; \
84 _f = atomic_read(&qemu_rec_mutex_trylock_func); \
85 _f(m, __FILE__, __LINE__); \
86 })
87
88#define qemu_cond_wait(c, m) ({ \
89 QemuCondWaitFunc _f = atomic_read(&qemu_cond_wait_func); \
90 _f(c, m, __FILE__, __LINE__); \
91 })
92#endif
93
94#define qemu_mutex_unlock(mutex) \
95 qemu_mutex_unlock_impl(mutex, __FILE__, __LINE__)
96
97static inline void (qemu_mutex_lock)(QemuMutex *mutex)
98{
99 qemu_mutex_lock(mutex);
100}
101
102static inline int (qemu_mutex_trylock)(QemuMutex *mutex)
103{
104 return qemu_mutex_trylock(mutex);
105}
106
107static inline void (qemu_mutex_unlock)(QemuMutex *mutex)
108{
109 qemu_mutex_unlock(mutex);
110}
111
112static inline void (qemu_rec_mutex_lock)(QemuRecMutex *mutex)
113{
114 qemu_rec_mutex_lock(mutex);
115}
116
117static inline int (qemu_rec_mutex_trylock)(QemuRecMutex *mutex)
118{
119 return qemu_rec_mutex_trylock(mutex);
120}
121
122
123void qemu_rec_mutex_init(QemuRecMutex *mutex);
124
125void qemu_cond_init(QemuCond *cond);
126void qemu_cond_destroy(QemuCond *cond);
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133void qemu_cond_signal(QemuCond *cond);
134void qemu_cond_broadcast(QemuCond *cond);
135void qemu_cond_wait_impl(QemuCond *cond, QemuMutex *mutex,
136 const char *file, const int line);
137
138static inline void (qemu_cond_wait)(QemuCond *cond, QemuMutex *mutex)
139{
140 qemu_cond_wait(cond, mutex);
141}
142
143void qemu_sem_init(QemuSemaphore *sem, int init);
144void qemu_sem_post(QemuSemaphore *sem);
145void qemu_sem_wait(QemuSemaphore *sem);
146int qemu_sem_timedwait(QemuSemaphore *sem, int ms);
147void qemu_sem_destroy(QemuSemaphore *sem);
148
149void qemu_event_init(QemuEvent *ev, bool init);
150void qemu_event_set(QemuEvent *ev);
151void qemu_event_reset(QemuEvent *ev);
152void qemu_event_wait(QemuEvent *ev);
153void qemu_event_destroy(QemuEvent *ev);
154
155void qemu_thread_create(QemuThread *thread, const char *name,
156 void *(*start_routine)(void *),
157 void *arg, int mode);
158void *qemu_thread_join(QemuThread *thread);
159void qemu_thread_get_self(QemuThread *thread);
160bool qemu_thread_is_self(QemuThread *thread);
161void qemu_thread_exit(void *retval);
162void qemu_thread_naming(bool enable);
163
164struct Notifier;
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179void qemu_thread_atexit_add(struct Notifier *notifier);
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188void qemu_thread_atexit_remove(struct Notifier *notifier);
189
190struct QemuSpin {
191 int value;
192};
193
194static inline void qemu_spin_init(QemuSpin *spin)
195{
196 __sync_lock_release(&spin->value);
197}
198
199static inline void qemu_spin_lock(QemuSpin *spin)
200{
201 while (unlikely(__sync_lock_test_and_set(&spin->value, true))) {
202 while (atomic_read(&spin->value)) {
203 cpu_relax();
204 }
205 }
206}
207
208static inline bool qemu_spin_trylock(QemuSpin *spin)
209{
210 return __sync_lock_test_and_set(&spin->value, true);
211}
212
213static inline bool qemu_spin_locked(QemuSpin *spin)
214{
215 return atomic_read(&spin->value);
216}
217
218static inline void qemu_spin_unlock(QemuSpin *spin)
219{
220 __sync_lock_release(&spin->value);
221}
222
223struct QemuLockCnt {
224#ifndef CONFIG_LINUX
225 QemuMutex mutex;
226#endif
227 unsigned count;
228};
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237void qemu_lockcnt_init(QemuLockCnt *lockcnt);
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245void qemu_lockcnt_destroy(QemuLockCnt *lockcnt);
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267void qemu_lockcnt_inc(QemuLockCnt *lockcnt);
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273void qemu_lockcnt_dec(QemuLockCnt *lockcnt);
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283bool qemu_lockcnt_dec_and_lock(QemuLockCnt *lockcnt);
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293bool qemu_lockcnt_dec_if_lock(QemuLockCnt *lockcnt);
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303void qemu_lockcnt_lock(QemuLockCnt *lockcnt);
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309void qemu_lockcnt_unlock(QemuLockCnt *lockcnt);
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322void qemu_lockcnt_inc_and_unlock(QemuLockCnt *lockcnt);
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332unsigned qemu_lockcnt_count(QemuLockCnt *lockcnt);
333
334#endif
335