(c-system-include "sys/types.h")
(c-system-include "sys/wait.h")
(c-system-include "signal.h")
(c-system-include "unistd.h")

(define-c-type siginfo_t
  predicate: signal-info?
  (int      si_signo    signal-number)
  (int      si_errno    signal-error-number)
  (int      si_code     signal-code)
  (pid_t    si_pid      signal-pid)
  (uid_t    si_uid      signal-uid)
  (int      si_status   signal-status)
  ;;(clock_t  si_utime    signal-user-time)
  ;;(clock_t  si_stime    signal-system-time)
  )

(define-c-type sigset_t
  predicate: signal-set?)

(define-c-const int (signal/hang-up "SIGHUP"))
(define-c-const int (signal/interrupt "SIGINT"))
(define-c-const int (signal/quit "SIGQUIT"))
(define-c-const int (signal/illegal "SIGILL"))
(define-c-const int (signal/abort "SIGABRT"))
(define-c-const int (signal/fpe "SIGFPE"))
(define-c-const int (signal/kill "SIGKILL"))
(define-c-const int (signal/segv "SIGSEGV"))
(define-c-const int (signal/pipe "SIGPIPE"))
(define-c-const int (signal/alarm "SIGALRM"))
(define-c-const int (signal/term "SIGTERM"))
(define-c-const int (signal/user1"SIGUSR1"))
(define-c-const int (signal/user2 "SIGUSR2"))
(define-c-const int (signal/child "SIGCHLD"))
(define-c-const int (signal/continue "SIGCONT"))
(define-c-const int (signal/stop "SIGSTOP"))
(define-c-const int (signal/tty-stop "SIGTSTP"))
(define-c-const int (signal/tty-input "SIGTTIN"))
(define-c-const int (signal/tty-output "SIGTTOU"))

(c-include "signal.c")

(define-c sexp (set-signal-action! "sexp_set_signal_action")
  ((value ctx sexp) (value self sexp) sexp  sexp))

(define-c errno (make-signal-set "sigemptyset") ((pointer result sigset_t)))
(define-c errno (signal-set-fill! "sigfillset") ((pointer sigset_t)))
(define-c errno (signal-set-add! "sigaddset") ((pointer sigset_t) int))
(define-c errno (signal-set-delete! "sigaddset") ((pointer sigset_t) int))
(define-c boolean (signal-set-contains? "sigismember") ((pointer sigset_t) int))

(define-c errno (signal-mask-block! "sigprocmask")
  ((value SIG_BLOCK int) (pointer sigset_t) (pointer value NULL sigset_t)))
(define-c errno (signal-mask-unblock! "sigprocmask")
  ((value SIG_UNBLOCK int) (pointer sigset_t) (pointer value NULL sigset_t)))
(define-c errno (signal-mask-set! "sigprocmask")
  ((value SIG_SETMASK int) (pointer sigset_t) (pointer value NULL sigset_t)))
(define-c errno (current-signal-mask "sigprocmask")
  ((value SIG_BLOCK int) (pointer value NULL sigset_t) (pointer result sigset_t)))

(define-c unsigned-int alarm (unsigned-int))
(define-c unsigned-int sleep (unsigned-int))

(define-c pid_t fork ())
;;(define-c pid_t wait ((result int)))
(define-c pid_t waitpid (int (result int) int))
(define-c errno kill (int int))
;;(define-c errno raise (int))
(define-c void exit (int))
(define-c int (execute execvp) (string (array string)))

(cond-expand
 (unix)
 (else
  (define-c sexp (process-command-line sexp_pid_cmdline) ((value ctx sexp) int))))

(c-init "sexp_init_signals(ctx, env);")