The dpblock man page

NAME
     dpblock - disable DP-related system signals

SYNOPSIS
     #include 

     int dpblock()

DESCRIPTION
     dpblock()  disables  system  signals  used  by  DP,  namely,
     SIGALRM and SIGIO.  It does not affect any other signals.

     dpblock() is used mostly to avoid race conditions caused  by
     DP activities.  It should be called before accessing objects
     that could be modified by a message catching function.   For
     instance,  it  should  be  invoked before updating a counter
     variable for counting the number of messages received by the
     current process.

     To indicate the end of a critical code  segment,  use  dpun-
     block().

     SCHEME:
               dpblock();
               critical section
               dpunblock();

RETURN VALUES
     dpblock() returns the current system signal mask.

REMARK
     This is a DP function call.

AUTHOR
     David Arnow

FILES
     /usr/include/dp/dp.h - DP header file
     /usr/lib/libdp.a     - DP library file

SEE ALSO
     dpunblock(3DP), dppause(3DP), dpcall(3DP), sigblock(2)

Essential DP MAN Pages:

• dp
• dpinit
• dpspawn
• dpexit
• dpgetpid

• dprecv
• dpwrite