pthread_sigmask

Syntax

  #include <pthread.h>
  #include <signal.h>
   
  int   pthread_sigmask (
     int               how,
     const sigset_t   *set,
     sigset_t         *oset);
  

Parameters

how

(IN) Specifies how the signal mask should change using one of the following flags:

Flag	Value	Description
SIG_BLOCK	0x00000000	Adds the signal pointed to by the set parameter to the current mask set.
SIG_UNBLOCK	0x00000001	Removes the signal pointed to by the set parameter from the current mask set.
SIG_SETMASK	0xFFFFFFFF	Replaces the current mask set with the signal pointed to by the set parameter.

set

(IN) Points to an application-defined signal.

oset

(OUT) Points to the current signal mask for the calling thread. If both the how and set parameters are 0, the signal mask is unchanged and the oset parameter returns the current value of the signal mask.

Return Values

If successful, returns 0. Otherwise, returns a nonzero error code.

Remarks

LibC does not interpret the specific interrupt being posted, so you are free to associate application-specific semantics to the set of interrupts you plan to use. Also, LibC does not queue interrupts. Posting multiple instances of a given interrupt results in only one instance of the interrupt being posted.