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atm_win32.h
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33 
34 #ifndef GRPC_SUPPORT_ATM_WIN32_H
35 #define GRPC_SUPPORT_ATM_WIN32_H
36 
37 /* Win32 variant of atm_platform.h */
39 
41 
42 #define gpr_atm_full_barrier MemoryBarrier
43 
44 static __inline gpr_atm gpr_atm_acq_load(const gpr_atm *p) {
45  gpr_atm result = *p;
47  return result;
48 }
49 
50 static __inline gpr_atm gpr_atm_no_barrier_load(const gpr_atm *p) {
51  /* TODO(dklempner): Can we implement something better here? */
52  return gpr_atm_acq_load(p);
53 }
54 
55 static __inline void gpr_atm_rel_store(gpr_atm *p, gpr_atm value) {
57  *p = value;
58 }
59 
60 static __inline void gpr_atm_no_barrier_store(gpr_atm *p, gpr_atm value) {
61  /* TODO(ctiller): Can we implement something better here? */
62  gpr_atm_rel_store(p, value);
63 }
64 
65 static __inline int gpr_atm_no_barrier_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
66 /* InterlockedCompareExchangePointerNoFence() not available on vista or
67  windows7 */
68 #ifdef GPR_ARCH_64
69  return o == (gpr_atm)InterlockedCompareExchangeAcquire64(
70  (volatile LONGLONG *)p, (LONGLONG)n, (LONGLONG)o);
71 #else
72  return o == (gpr_atm)InterlockedCompareExchangeAcquire((volatile LONG *)p,
73  (LONG)n, (LONG)o);
74 #endif
75 }
76 
77 static __inline int gpr_atm_acq_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
78 #ifdef GPR_ARCH_64
79  return o == (gpr_atm)InterlockedCompareExchangeAcquire64(
80  (volatile LONGLONG *)p, (LONGLONG)n, (LONGLONG)o);
81 #else
82  return o == (gpr_atm)InterlockedCompareExchangeAcquire((volatile LONG *)p,
83  (LONG)n, (LONG)o);
84 #endif
85 }
86 
87 static __inline int gpr_atm_rel_cas(gpr_atm *p, gpr_atm o, gpr_atm n) {
88 #ifdef GPR_ARCH_64
89  return o == (gpr_atm)InterlockedCompareExchangeRelease64(
90  (volatile LONGLONG *)p, (LONGLONG)n, (LONGLONG)o);
91 #else
92  return o == (gpr_atm)InterlockedCompareExchangeRelease((volatile LONG *)p,
93  (LONG)n, (LONG)o);
94 #endif
95 }
96 
98  gpr_atm delta) {
99  /* Use the CAS operation to get pointer-sized fetch and add */
100  gpr_atm old;
101  do {
102  old = *p;
103  } while (!gpr_atm_no_barrier_cas(p, old, old + delta));
104  return old;
105 }
106 
107 static __inline gpr_atm gpr_atm_full_fetch_add(gpr_atm *p, gpr_atm delta) {
108  /* Use a CAS operation to get pointer-sized fetch and add */
109  gpr_atm old;
110 #ifdef GPR_ARCH_64
111  do {
112  old = *p;
113  } while (old != (gpr_atm)InterlockedCompareExchange64((volatile LONGLONG *)p,
114  (LONGLONG)old + delta,
115  (LONGLONG)old));
116 #else
117  do {
118  old = *p;
119  } while (old != (gpr_atm)InterlockedCompareExchange(
120  (volatile LONG *)p, (LONG)old + delta, (LONG)old));
121 #endif
122  return old;
123 }
124 
125 #endif /* GRPC_SUPPORT_ATM_WIN32_H */
const char * value
Definition: hpack_table.c:44
intptr_t gpr_intptr
Definition: port_platform.h:315
#define gpr_atm_no_barrier_fetch_add(p, delta)
Definition: atm_gcc_atomic.h:52
#define gpr_atm_acq_load(p)
Definition: atm_gcc_atomic.h:45
#define gpr_atm_no_barrier_load(p)
Definition: atm_gcc_atomic.h:46
#define gpr_atm_acq_cas(p, o, n)
Definition: atm_gcc_sync.h:84
#define gpr_atm_full_fetch_add(p, delta)
Definition: atm_gcc_atomic.h:54
#define gpr_atm_no_barrier_store(p, value)
Definition: atm_gcc_atomic.h:49
#define gpr_atm_rel_store(p, value)
Definition: atm_gcc_atomic.h:47
#define gpr_atm_no_barrier_cas(p, o, n)
Definition: atm_gcc_sync.h:83
#define gpr_atm_rel_cas(p, o, n)
Definition: atm_gcc_sync.h:85
gpr_intptr gpr_atm
Definition: atm_win32.h:40
gpr_intptr gpr_atm
Definition: atm_gcc_atomic.h:41
#define gpr_atm_full_barrier
Definition: atm_win32.h:42