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- XtAppAddSignal(3Xt) XT FUNCTIONS XtAppAddSignal(3Xt)
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- NNAAMMEE
- XtAppAddSignal, XtRemoveSignal, XtNoticeSignal - register
- and remove a signal source
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- SSYYNNTTAAXX
- XtSignalId XtAppAddSignal(_a_p_p___c_o_n_t_e_x_t, _p_r_o_c, _c_l_i_e_n_t___d_a_t_a)
- XtAppContext _a_p_p___c_o_n_t_e_x_t;
- XtInputCallbackProc _p_r_o_c;
- XtPointer _c_l_i_e_n_t___d_a_t_a;
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- void XtRemoveSignal(_i_d)
- XtSignalId _i_d;
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- void XtNoticeSignal(_i_d)
- XtSignalId _i_d)
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- AARRGGUUMMEENNTTSS
- _a_p_p___c_o_n_t_e_x_t
- Specifies the application context.
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- _c_l_i_e_n_t___d_a_t_a
- Specifies the argument that is to be passed to
- the specified procedure when a signal has been
- raised.
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- _i_d Specifies the ID returned from the corresponding
- _X_t_A_p_p_A_d_d_S_i_g_n_a_l call.
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- _p_r_o_c Specifies the procedure that is to be called
- when the signal has been raised.
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- DDEESSCCRRIIPPTTIIOONN
- The _X_t_A_p_p_A_d_d_S_i_g_n_a_l function initiates a mechanism for han-
- dling signals within the context of the Intrinsics. Prior
- to establishing an operating system dependent signal han-
- dler the application may call _X_t_A_p_p_A_d_d_S_i_g_n_a_l and store the
- returned _i_d in a place accessible to the signal handler.
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- Upon receipt of a signal from the operating system, the
- application may call _X_t_N_o_t_i_c_e_S_i_g_n_a_l passing the _i_d
- returned by the call to _X_t_A_p_p_A_d_d_S_i_g_n_a_l.
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- _X_t_N_o_t_i_c_e_S_i_g_n_a_l is the only Intrinsics function that can
- safely be called from a signal handler. If _X_t_N_o_t_i_c_e_S_i_g_n_a_l
- is called multiple times before the Intrinsics are able to
- invoke the registered callback, the callback is only
- called once. Logically the Intrinsics maintain ``pending''
- for each registered callback. This flag is initially _F_a_l_s_e
- and is set to _T_r_u_e by _X_t_N_o_t_i_c_e_S_i_g_n_a_l; the Intrinsics
- invoke the callback whenever the flag is _T_r_u_e, and the
- flag is set to _F_a_l_s_e just before the callback is invoked.
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- The _X_t_R_e_m_o_v_e_S_i_g_n_a_l function is called to remove the speci-
- fied Intrinsics signal handler. The client should disable
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- X Version 11 Release 6.1 1
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- XtAppAddSignal(3Xt) XT FUNCTIONS XtAppAddSignal(3Xt)
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- the source of the signal before calling _X_t_R_e_m_o_v_e_S_i_g_n_a_l.
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- SSEEEE AALLSSOO
- XtAppAddTime-
- Out(3Xt),XtAppAddInput(3Xt),XtAppAddWorkProc(3Xt)
- _X _T_o_o_l_k_i_t _I_n_t_r_i_n_s_i_c_s _- _C _L_a_n_g_u_a_g_e _I_n_t_e_r_f_a_c_e
- _X_l_i_b _- _C _L_a_n_g_u_a_g_e _X _I_n_t_e_r_f_a_c_e
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- X Version 11 Release 6.1 2
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