mirror of https://gitlab.com/QEF/q-e.git
127 lines
3.4 KiB
Fortran
127 lines
3.4 KiB
Fortran
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MODULE set_signal
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! This module is a Fortran 2003 interface to the customize_signals.c C file
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! Compatible with Intel/PGI/Gcc(>=4.3) compilers
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! This module is compiled only if the -D__TRAP_USR1 preproc. option is
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! fed at configure time
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#if defined __TRAP_SIGUSR1
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USE iso_c_binding
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USE io_global, ONLY : stdout
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USE mp_global, ONLY : root, world_comm, mp_bcast, mpime
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IMPLICIT NONE
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LOGICAL,VOLATILE::signal_trapped
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INTERFACE
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FUNCTION init_signal_USR1(new_handler) BIND(c, name = "init_signal_USR1")
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USE iso_c_binding
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TYPE(C_FUNPTR),VALUE,INTENT(IN):: new_handler
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INTEGER(C_INT)::init_signal_USR1
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END FUNCTION init_signal_USR1
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FUNCTION init_signal(signum, new_handler) BIND(c, name = "init_signal")
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USE iso_c_binding
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INTEGER(C_INT),VALUE :: signum
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TYPE(C_FUNPTR), VALUE :: new_handler
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INTEGER(C_INT)::init_signal
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END FUNCTION init_signal
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END INTERFACE
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CONTAINS
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SUBROUTINE set_signal_USR1(routine)
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USE iso_c_binding
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TYPE(C_FUNPTR),TARGET::ptr
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INTERFACE
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SUBROUTINE routine(signal) bind(C)
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USE iso_c_binding
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INTEGER(C_INT),VALUE, INTENT(IN)::signal
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END SUBROUTINE routine
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END INTERFACE
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ptr = C_FUNLOC(routine)
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IF (init_signal_USR1(ptr) .NE. 0) THEN
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CALL errore("set_signal_USR1", "The association of signal USR1 failed!", 1)
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ENDIF
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END SUBROUTINE set_signal_USR1
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! Unused. Here for possible future developments
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SUBROUTINE set_signal_action(signal, routine)
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USE iso_c_binding
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INTEGER::signal
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TYPE(C_FUNPTR),TARGET::ptr
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INTERFACE
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SUBROUTINE routine(signal) bind(C)
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USE iso_c_binding
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INTEGER(C_INT),VALUE::signal
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END SUBROUTINE routine
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END INTERFACE
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ptr = C_FUNLOC(routine)
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IF (init_signal(signal, ptr) .NE. 0) THEN
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CALL errore("set_signal", "The association of the signal failed!", 1)
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ENDIF
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END SUBROUTINE set_signal_action
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! Sets the signal_trapped flag on all nodes/processors
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! Only the master will use the signal, though
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SUBROUTINE custom_handler(signum) BIND(c)
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USE iso_c_binding
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INTEGER(C_INT),VALUE:: signum
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WRITE(UNIT = stdout, FMT = *) " **** Trapped signal", signum
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signal_trapped = .TRUE.
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END SUBROUTINE custom_handler
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! Set the signal handler for SIGUSR1 to 'custom_handler'
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! Every processor will trap the signal, howver only 0 will actually
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! use the result (required since the default action for SIGUSR1 is
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! exit)
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SUBROUTINE signal_trap_init
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USE iso_c_binding
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WRITE(UNIT = stdout, FMT=*) " signal trapping enabled: kill the code with -SIGUSR1 to stop cleanly the simulation "
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CALL set_signal_USR1(custom_handler)
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END SUBROUTINE signal_trap_init
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FUNCTION signal_detected()
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LOGICAL::signal_detected
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! If the signal is trapped, set the exit status and broadcast it
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! DO NOT broadcast the signal_trapped variable or you will be Very
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! Sorry
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signal_detected = signal_trapped
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CALL mp_bcast(signal_detected, root, world_comm)
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END FUNCTION signal_detected
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#else
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USE io_global, ONLY : stdout
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CONTAINS
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! Place holders to employ when the signal trapping feature is disabled
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SUBROUTINE signal_trap_init
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WRITE(UNIT = stdout, FMT=*) " signal trapping disabled: compile with "
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WRITE(UNIT = stdout, FMT=*) " -D__TRAP_SIGUSR1 to enable this feature"
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END SUBROUTINE signal_trap_init
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FUNCTION signal_detected()
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LOGICAL::signal_detected
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signal_detected = .FALSE.
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END FUNCTION signal_detected
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#endif
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END MODULE set_signal
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