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Public Member Functions |
| ACE_Errno_Guard (ACE_ERRNO_TYPE &errno_ref, int error) |
| ACE_Errno_Guard (ACE_ERRNO_TYPE &errno_ref) |
| ~ACE_Errno_Guard (void) |
| Reset the value of <errno> to <error>.
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int | operator= (int error) |
| Assign <error> to <error_>.
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bool | operator== (int error) |
| Compare <error> with <error_> for equality.
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bool | operator!= (int error) |
| Compare <error> with <error_> for inequality.
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Private Attributes |
int | error_ |
The typical use-case for this is the following: int error = errno; call_some_function_that_might_change_errno (); errno = error; This can be replaced with { ACE_Errno_Guard guard (errno); call_some_function_that_might_change_errno (); } This implementation is more elegant and more efficient since it avoids an unnecessary second access to thread-specific storage by caching a pointer to the value of errno in TSS.