# signal-defs.h ## **Overview** **Related Modules:** [IPC](IPC.md) **Description:** Defines the structures and macros for signal operations. **Since:** 1.0 **Version:** 1.0 ## **Summary** ## Macros

Macro Name and Value	Description
SIG_BLOCK 0
SIG_UNBLOCK 1
SIG_SETMASK 2
SIG_DFL ((__sighandler_t)0)
SIG_IGN ((__sighandler_t)1)
SIG_ERR ((__sighandler_t)-1)