MySQL  8.0.19
Source Code Documentation
thr_mutex_bits.h
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22 
23 #ifndef COMPONENTS_SERVICES_THR_MUTEX_BITS_H
24 #define COMPONENTS_SERVICES_THR_MUTEX_BITS_H
25 
26 #if defined(_WIN32)
27 #include <windows.h>
28 #else
29 #include <pthread.h> // IWYU pragma: export
30 #include <sched.h> // IWYU pragma: export
31 #endif
32 
33 /**
34  @file
35  ABI for thd_mutex
36 
37  There are three "layers":
38  1) native_mutex_*()
39  Functions that map directly down to OS primitives.
40  Windows - CriticalSection
41  Other OSes - pthread
42  2) my_mutex_*()
43  Functions that implement SAFE_MUTEX (default for debug),
44  Otherwise native_mutex_*() is used.
45  3) mysql_mutex_*()
46  Functions that include Performance Schema instrumentation.
47  See include/mysql/psi/mysql_thread.h
48 */
49 
50 #ifdef _WIN32
51 typedef CRITICAL_SECTION native_mutex_t;
52 typedef int native_mutexattr_t;
53 #else
54 typedef pthread_mutex_t native_mutex_t;
55 typedef pthread_mutexattr_t native_mutexattr_t;
56 #endif
57 
58 struct safe_mutex_t;
59 
60 struct my_mutex_t {
61  union u {
63  safe_mutex_t *m_safe_ptr;
64  } m_u;
65 };
66 typedef struct my_mutex_t my_mutex_t;
67 
68 #endif /* COMPONENTS_SERVICES_THR_MUTEX_BITS_H */
my_mutex_t
Definition: thr_mutex_bits.h:60
my_mutex_t::u
Definition: thr_mutex_bits.h:61
my_mutex_t::u::m_safe_ptr
safe_mutex_t * m_safe_ptr
Definition: thr_mutex_bits.h:63
my_mutex_t::u::m_native
native_mutex_t m_native
Definition: thr_mutex_bits.h:62
native_mutexattr_t
pthread_mutexattr_t native_mutexattr_t
Definition: thr_mutex_bits.h:55
native_mutex_t
pthread_mutex_t native_mutex_t
Definition: thr_mutex_bits.h:54
my_mutex_t::m_u
union my_mutex_t::u m_u