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- NNNNAAAAMMMMEEEE
- XFlush, XSync, XEventsQueued, XPending - handle output
- buffer or event queue
-
- SSSSYYYYNNNNTTTTAAAAXXXX
- XFlush(_d_i_s_p_l_a_y)
- Display *_d_i_s_p_l_a_y;
-
- XSync(_d_i_s_p_l_a_y, _d_i_s_c_a_r_d)
- Display *_d_i_s_p_l_a_y;
- Bool _d_i_s_c_a_r_d;
-
- int XEventsQueued(_d_i_s_p_l_a_y, _m_o_d_e)
- Display *_d_i_s_p_l_a_y;
- int _m_o_d_e;
-
- int XPending(_d_i_s_p_l_a_y)
- Display *_d_i_s_p_l_a_y;
-
- AAAARRRRGGGGUUUUMMMMEEEENNNNTTTTSSSS
- _d_i_s_c_a_r_d Specifies a Boolean value that indicates whether
- _X_S_y_n_c discards all events on the event queue.
-
- _d_i_s_p_l_a_y Specifies the connection to the X server.
-
- _m_o_d_e Specifies the mode. You can pass _Q_u_e_u_e_d_A_l_r_e_a_d_y,
- _Q_u_e_u_e_d_A_f_t_e_r_F_l_u_s_h, or _Q_u_e_u_e_d_A_f_t_e_r_R_e_a_d_i_n_g.
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- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- The _X_F_l_u_s_h function flushes the output buffer. Most client
- applications need not use this function because the output
- buffer is automatically flushed as needed by calls to
- _X_P_e_n_d_i_n_g, _X_N_e_x_t_E_v_e_n_t, and _X_W_i_n_d_o_w_E_v_e_n_t. Events generated by
- the server may be enqueued into the library's event queue.
-
- The _X_S_y_n_c function flushes the output buffer and then waits
- until all requests have been received and processed by the X
- server. Any errors generated must be handled by the error
- handler. For each protocol error received by Xlib, _X_S_y_n_c
- calls the client application's error handling routine (see
- section 11.8.2). Any events generated by the server are
- enqueued into the library's event queue.
-
- Finally, if you passed _F_a_l_s_e, _X_S_y_n_c does not discard the
- events in the queue. If you passed _T_r_u_e, _X_S_y_n_c discards all
- events in the queue, including those events that were on the
- queue before _X_S_y_n_c was called. Client applications seldom
- need to call _X_S_y_n_c.
-
- If mode is _Q_u_e_u_e_d_A_l_r_e_a_d_y, _X_E_v_e_n_t_s_Q_u_e_u_e_d returns the number
- of events already in the event queue (and never performs a
- system call). If mode is _Q_u_e_u_e_d_A_f_t_e_r_F_l_u_s_h, _X_E_v_e_n_t_s_Q_u_e_u_e_d
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- Page 1 (printed 4/30/98)
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- XXXXFFFFlllluuuusssshhhh((((3333XXXX11111111)))) XXXX VVVVeeeerrrrssssiiiioooonnnn 11111111 ((((RRRReeeelllleeeeaaaasssseeee 6666....3333)))) XXXXFFFFlllluuuusssshhhh((((3333XXXX11111111))))
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-
-
- returns the number of events already in the queue if the
- number is nonzero. If there are no events in the queue,
- _X_E_v_e_n_t_s_Q_u_e_u_e_d flushes the output buffer, attempts to read
- more events out of the application's connection, and returns
- the number read. If mode is _Q_u_e_u_e_d_A_f_t_e_r_R_e_a_d_i_n_g,
- _X_E_v_e_n_t_s_Q_u_e_u_e_d returns the number of events already in the
- queue if the number is nonzero. If there are no events in
- the queue, _X_E_v_e_n_t_s_Q_u_e_u_e_d attempts to read more events out of
- the application's connection without flushing the output
- buffer and returns the number read.
-
- _X_E_v_e_n_t_s_Q_u_e_u_e_d always returns immediately without I/O if
- there are events already in the queue. _X_E_v_e_n_t_s_Q_u_e_u_e_d with
- mode _Q_u_e_u_e_d_A_f_t_e_r_F_l_u_s_h is identical in behavior to _X_P_e_n_d_i_n_g.
- _X_E_v_e_n_t_s_Q_u_e_u_e_d with mode _Q_u_e_u_e_d_A_l_r_e_a_d_y is identical to the
- _X_Q_L_e_n_g_t_h function.
-
- The _X_P_e_n_d_i_n_g function returns the number of events that have
- been received from the X server but have not been removed
- from the event queue. _X_P_e_n_d_i_n_g is identical to
- _X_E_v_e_n_t_s_Q_u_e_u_e_d with the mode _Q_u_e_u_e_d_A_f_t_e_r_F_l_u_s_h specified.
-
- SSSSEEEEEEEE AAAALLLLSSSSOOOO
- AllPlanes(3X11), XIfEvent(3X11), XNextEvent(3X11),
- XPutBackEvent(3X11)
- _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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- Page 2 (printed 4/30/98)
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