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28 .Dt PTHREAD_SPIN_INIT 3
31 .Nm pthread_spin_init , pthread_spin_destroy
32 .Nd "initialize or destroy a spin lock"
39 .Fn pthread_spin_init "pthread_spinlock_t *lock" "int pshared"
41 .Fn pthread_spin_destroy "pthread_spinlock_t *lock"
45 function will initialize
47 to an unlocked state and
48 allocate any resources necessary to begin using it.
52 .Dv PTHREAD_PROCESS_SHARED ,
54 whether belonging to the process in which the spinlock was created or not,
55 that has access to the memory area where
60 .Dv PTHREAD_PROCESS_PRIVATE ,
61 it can only be used by threads within the same process.
64 .Fn pthread_spin_destroy
67 and release any resources that may have been allocated on its behalf.
73 .Fn pthread_spin_destroy
75 Otherwise, an error number will be returned to indicate the error.
77 Neither of these functions will return
83 .Fn pthread_spin_destroy
84 functions will fail if:
87 An attempt to initialize or destroy
91 The value specified by
98 function will fail if:
101 Insufficient resources,
106 Insufficient memory to initialize
110 .Xr pthread_spin_lock 3 ,
111 .Xr pthread_spin_unlock 3
114 .Fn pthread_spin_init
116 .Fn pthread_spin_destroy
117 functions first appeared in
126 The implementation of
127 .Fn pthread_spin_init
128 does not fully conform to
132 argument is ignored in
136 if any value other than
137 .Dv PTHREAD_PROCESSES_PRIVATE
138 is specified, it returns