diff options
Diffstat (limited to 'doc/Notifier.3')
| -rw-r--r-- | doc/Notifier.3 | 38 |
1 files changed, 25 insertions, 13 deletions
diff --git a/doc/Notifier.3 b/doc/Notifier.3 index 4eddc54..f2976b1 100644 --- a/doc/Notifier.3 +++ b/doc/Notifier.3 @@ -5,13 +5,11 @@ '\" See the file "license.terms" for information on usage and redistribution '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. '\" -'\" RCS: @(#) $Id: Notifier.3,v 1.23 2008/07/24 21:54:43 nijtmans Exp $ -'\" -.so man.macros .TH Notifier 3 8.1 Tcl "Tcl Library Procedures" +.so man.macros .BS .SH NAME -Tcl_CreateEventSource, Tcl_DeleteEventSource, Tcl_SetMaxBlockTime, Tcl_QueueEvent, Tcl_ThreadQueueEvent, Tcl_ThreadAlert, Tcl_GetCurrentThread, Tcl_DeleteEvents, Tcl_InitNotifier, Tcl_FinalizeNotifier, Tcl_WaitForEvent, Tcl_AlertNotifier, Tcl_SetTimer, Tcl_ServiceAll, Tcl_ServiceEvent, Tcl_GetServiceMode, Tcl_SetServiceMode \- the event queue and notifier interfaces +Tcl_CreateEventSource, Tcl_DeleteEventSource, Tcl_SetMaxBlockTime, Tcl_QueueEvent, Tcl_ThreadQueueEvent, Tcl_ThreadAlert, Tcl_GetCurrentThread, Tcl_DeleteEvents, Tcl_InitNotifier, Tcl_FinalizeNotifier, Tcl_WaitForEvent, Tcl_AlertNotifier, Tcl_SetTimer, Tcl_ServiceAll, Tcl_ServiceEvent, Tcl_GetServiceMode, Tcl_SetServiceMode, Tcl_ServiceModeHook, Tcl_SetNotifier \- the event queue and notifier interfaces .SH SYNOPSIS .nf \fB#include <tcl.h>\fR @@ -229,11 +227,13 @@ The procedure \fBTcl_CreateEventSource\fR creates a new event source. Its arguments specify the setup procedure and check procedure for the event source. \fISetupProc\fR should match the following prototype: +.PP .CS typedef void \fBTcl_EventSetupProc\fR( ClientData \fIclientData\fR, int \fIflags\fR); .CE +.PP The \fIclientData\fR argument will be the same as the \fIclientData\fR argument to \fBTcl_CreateEventSource\fR; it is typically used to point to private information managed by the event source. @@ -268,12 +268,14 @@ connection. The \fItimePtr\fR argument to \fBTcl_WaitForEvent\fR points to a structure that describes a time interval in seconds and microseconds: +.PP .CS typedef struct Tcl_Time { long \fIsec\fR; long \fIusec\fR; } \fBTcl_Time\fR; .CE +.PP The \fIusec\fR field should be less than 1000000. .PP Information provided to \fBTcl_SetMaxBlockTime\fR @@ -303,11 +305,13 @@ The second procedure provided by each event source is its check procedure, indicated by the \fIcheckProc\fR argument to \fBTcl_CreateEventSource\fR. \fICheckProc\fR must match the following prototype: +.PP .CS typedef void \fBTcl_EventCheckProc\fR( ClientData \fIclientData\fR, int \fIflags\fR); .CE +.PP The arguments to this procedure are the same as those for \fIsetupProc\fR. \fBCheckProc\fR is invoked by \fBTcl_DoOneEvent\fR after it has waited for events. Presumably at least one event source is now prepared to @@ -326,12 +330,14 @@ to that event source. However, the first element of the structure must be a structure of type \fBTcl_Event\fR, and the address of this structure is used when communicating between the event source and the rest of the notifier. A \fBTcl_Event\fR has the following definition: +.PP .CS typedef struct { Tcl_EventProc *\fIproc\fR; struct Tcl_Event *\fInextPtr\fR; } \fBTcl_Event\fR; .CE +.PP The event source must fill in the \fIproc\fR field of the event before calling \fBTcl_QueueEvent\fR. The \fInextPtr\fR is used to link together the events in the queue @@ -359,11 +365,13 @@ When it is time to handle an event from the queue (steps 1 and 4 above) \fBTcl_ServiceEvent\fR will invoke the \fIproc\fR specified in the first queued \fBTcl_Event\fR structure. \fIProc\fR must match the following prototype: +.PP .CS typedef int \fBTcl_EventProc\fR( Tcl_Event *\fIevPtr\fR, int \fIflags\fR); .CE +.PP The first argument to \fIproc\fR is a pointer to the event, which will be the same as the first argument to the \fBTcl_QueueEvent\fR call that added the event to the queue. @@ -403,7 +411,7 @@ an event to the current thread's queue. To add an event to another thread's queue, use \fBTcl_ThreadQueueEvent\fR. \fBTcl_ThreadQueueEvent\fR accepts as an argument a Tcl_ThreadId argument, which uniquely identifies a thread in a Tcl application. To obtain the -Tcl_ThreadID for the current thread, use the \fBTcl_GetCurrentThread\fR +Tcl_ThreadId for the current thread, use the \fBTcl_GetCurrentThread\fR procedure. (A thread would then need to pass this identifier to other threads for those threads to be able to add events to its queue.) After adding an event to another thread's queue, you then typically @@ -416,11 +424,13 @@ events from the event queue. \fBTcl_DeleteEvents\fR calls \fIproc\fR for each event in the queue, deleting those for with the procedure returns 1. Events for which the procedure returns 0 are left in the queue. \fIProc\fR should match the following prototype: +.PP .CS typedef int \fBTcl_EventDeleteProc\fR( Tcl_Event *\fIevPtr\fR, ClientData \fIclientData\fR); .CE +.PP The \fIclientData\fR argument will be the same as the \fIclientData\fR argument to \fBTcl_DeleteEvents\fR; it is typically used to point to private information managed by the event source. The \fIevPtr\fR will @@ -537,18 +547,20 @@ to another program, such as a Web browser plugin. To do this, the extension makes a call to \fBTcl_SetNotifier\fR passing a pointer to a \fBTcl_NotifierProcs\fR data structure. The structure has the following layout: +.PP .CS typedef struct Tcl_NotifierProcs { - Tcl_SetTimerProc *setTimerProc; - Tcl_WaitForEventProc *waitForEventProc; - Tcl_CreateFileHandlerProc *createFileHandlerProc; - Tcl_DeleteFileHandlerProc *deleteFileHandlerProc; - Tcl_InitNotifierProc *initNotifierProc; - Tcl_FinalizeNotifierProc *finalizeNotifierProc; - Tcl_AlertNotifierProc *alertNotifierProc; - Tcl_ServiceModeHookProc *serviceModeHookProc; + Tcl_SetTimerProc *\fIsetTimerProc\fR; + Tcl_WaitForEventProc *\fIwaitForEventProc\fR; + Tcl_CreateFileHandlerProc *\fIcreateFileHandlerProc\fR; + Tcl_DeleteFileHandlerProc *\fIdeleteFileHandlerProc\fR; + Tcl_InitNotifierProc *\fIinitNotifierProc\fR; + Tcl_FinalizeNotifierProc *\fIfinalizeNotifierProc\fR; + Tcl_AlertNotifierProc *\fIalertNotifierProc\fR; + Tcl_ServiceModeHookProc *\fIserviceModeHookProc\fR; } \fBTcl_NotifierProcs\fR; .CE +.PP Following the call to \fBTcl_SetNotifier\fR, the pointers given in the \fBTcl_NotifierProcs\fR structure replace whatever notifier had been installed in the process. |