kernel/ipc.h

   1 #ifndef IPC_H
   2 #define IPC_H
   3
   4 /* This header file defines constants for MINIX inter-process communication.
   5  * These definitions are used in the file proc.c.
   6  */
   7 #include <minix/com.h>
   8
   9 /* Masks and flags for system calls. */
  10 #define NON_BLOCKING    0x0080  /* do not block if target not ready */
  11
  12 /* System call numbers that are passed when trapping to the kernel. */
  13 #define SEND               1    /* blocking send */
  14 #define RECEIVE            2    /* blocking receive */
  15 #define SENDREC            3    /* SEND + RECEIVE */
  16 #define NOTIFY             4    /* asynchronous notify */
  17 #define SENDNB             5    /* nonblocking send */
  18 #define SENDA              16   /* asynchronous send */
  19
  20 #define WILLRECEIVE(target, source_ep) \
  21   ((RTS_ISSET(target, RTS_RECEIVING) && !RTS_ISSET(target, RTS_SENDING)) &&     \
  22     (target->p_getfrom_e == ANY || target->p_getfrom_e == source_ep))
  23
  24
  25 #endif /* IPC_H */