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Replace all calls to sigprocmask() in the OS proper with calls to nxsig_procmask().

    sched/signal:  Add internal OS interface nxsig_procmask().  This internal interface is equivalent to the standard sigprocmask() used by applications except that it does not modify the errno value.  Also fixes a problem in that the original sigprocmask() was not setting the errno.
This commit is contained in:
Gregory Nutt
2017-10-07 12:16:10 -06:00
parent 4810499d3a
commit d633c9bf8c
8 changed files with 138 additions and 42 deletions
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include/nuttx/signal.h
+42
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@@ -51,6 +51,48 @@
struct timespec; /* Forward reference */
/****************************************************************************
* Name: nxsig_procmask
*
* Description:
* This function allows the calling process to examine and/or change its
* signal mask. If the 'set' is not NULL, then it points to a set of
* signals to be used to change the currently blocked set. The value of
* 'how' indicates the manner in which the set is changed.
*
* If there any pending unblocked signals after the call to
* nxsig_procmask(), those signals will be delivered before
* nxsig_procmask() returns.
*
* If nxsig_procmask() fails, the signal mask of the process is not changed
* by this function call.
*
* This is an internal OS interface. It is functionally equivalent to
* sigprocmask() except that it does not modify the errno value.
*
* Parameters:
* how - How the signal mast will be changed:
* SIG_BLOCK - The resulting set is the union of the current set
* and the signal set pointed to by 'set'.
* SIG_UNBLOCK - The resulting set is the intersection of the current
* set and the complement of the signal set pointed to
* by 'set'.
* SIG_SETMASK - The resulting set is the signal set pointed to by
* 'set'.
* set - Location of the new signal mask
* oset - Location to store the old signal mask
*
* Return Value:
* This is an internal OS interface and should not be used by applications.
* It follows the NuttX internal error return policy: Zero (OK) is
* returned on success. A negated errno value is returned on failure.
*
* EINVAL - The 'how' argument is invalid.
*
****************************************************************************/
int nxsig_procmask(int how, FAR const sigset_t *set, FAR sigset_t *oset);
/****************************************************************************
* Name: nxsig_queue
*