1pthread_condattr_getpshareSdt(a3nCd)ard C Library Funcpttihornesad_condattr_getpshared(3C)
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NAME

6       pthread_condattr_getpshared,  pthread_condattr_setpshared  - get or set
7       process-shared condition variable attributes
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SYNOPSIS

10       cc -mt [ flag... ] file... -lpthread [ library... ]
11       #include <pthread.h>
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13       int pthread_condattr_getpshared(
14            const pthread_condattr_t *restrict attr,
15            int *restrict pshared);
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18       int pthread_condattr_setpshared(pthread_condattr_t *attr,
19            int pshared);
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DESCRIPTION

23       The pthread_condattr_getpshared() function obtains  the  value  of  the
24       process-shared attribute from the attributes object referenced by attr.
25       The pthread_condattr_setpshared() function is used to set the  process-
26       shared  attribute  in  an  initialized  attributes object referenced by
27       attr.
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30       The process-shared attribute is set to  PTHREAD_PROCESS_SHARED to  per‐
31       mit  a  condition  variable  to be operated upon by any thread that has
32       access to the memory where the condition variable is allocated, even if
33       the  condition variable is allocated in memory that is shared by multi‐
34       ple processes. If the process-shared attribute is  PTHREAD_PROCESS_PRI‐
35       VATE, the condition variable will only be operated upon by threads cre‐
36       ated within the same process as the thread that initialized the  condi‐
37       tion  variable; if threads of differing processes attempt to operate on
38       such a condition variable, the  behavior  is  undefined.   The  default
39       value of the attribute is PTHREAD_PROCESS_PRIVATE.
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42       Additional attributes, their default values, and the names of the asso‐
43       ciated functions to get and set those attribute values are  implementa‐
44       tion-dependent.
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RETURN VALUES

47       If  successful,  the pthread_condattr_setpshared() function returns  0.
48       Otherwise, an error number is returned to indicate the error.
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51       If successful, the pthread_condattr_getpshared()  function  returns   0
52       and  stores  the value of the process-shared attribute of attr into the
53       object referenced by the pshared parameter. Otherwise, an error  number
54       is returned to indicate the error.
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ERRORS

57       The   pthread_condattr_getpshared()  and  pthread_condattr_setpshared()
58       functions may fail if:
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60       EINVAL    The value specified by attr is invalid.
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64       The pthread_condattr_setpshared() function will fail if:
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66       EINVAL    The new value specified for  the  attribute  is  outside  the
67                 range of legal values for that attribute.
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ATTRIBUTES

71       See attributes(5) for descriptions of the following attributes:
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76       ┌─────────────────────────────┬─────────────────────────────┐
77       │      ATTRIBUTE TYPE         │      ATTRIBUTE VALUE        │
78       ├─────────────────────────────┼─────────────────────────────┤
79       │Interface Stability          │Standard                     │
80       ├─────────────────────────────┼─────────────────────────────┤
81       │MT-Level                     │MT-Safe                      │
82       └─────────────────────────────┴─────────────────────────────┘
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SEE ALSO

85       pthread_condattr_init(3C),  pthread_create(3C), pthread_mutex_init(3C),
86       pthread_cond_init(3C), attributes(5), standards(5)
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90SunOS 5.11                        23 Mar 2005  pthread_condattr_getpshared(3C)
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