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comparison mde/scheduler/InitFunctions.d @ 25:2c28ee04a4ed

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Some minor and some futile efforts. Played around with init functions, had problems, gave up and put them back. Removed idea for multiple init stages; it's not good for performance or simplicity. Adjusted exception messages. committer: Diggory Hardy <diggory.hardy@gmail.com>
author Diggory Hardy <diggory.hardy@gmail.com>
date Thu, 03 Apr 2008 17:26:52 +0100
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children 611f7b9063c6
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24:32eff0e01c05 25:2c28ee04a4ed
1 /** This module is responsible for calling all init functions.
2 *
3 * It is also responsible for setting up all scheduled functions for now. */
4 module mde.scheduler.InitFunctions;
5
6 static import mde.gl;
7
8 import tango.util.log.Log : Log, Logger;
9 static this() {
10 logger = Log.getLogger ("mde.scheduler.InitFunctions");
11 }
12
13 /** Should be called by an init function when a failure occurs. */
14 void setInitFailure () {
15 initFailure = true;
16 }
17
18 package:
19
20 /** Represents all functions to be called for a particular init stage. */
21 struct InitStage
22 {
23 alias void function() InitFunction; /// Alias
24
25 /** Add a function to be called during this init stage.
26 *
27 * Called in order added when not threaded (reverse order for cleanup).
28 *
29 * Exceptions should never be thrown, since each function may run as a thread, and catching
30 * thread exceptions is not guaranteed to work. Log a message, call setFailure() and return
31 * instead. */
32 void addFunc (InitFunction f) {
33 funcs ~= f;
34 }
35
36 InitFunction[] funcs = [];
37 }
38
39 InitStage init; // all functions called during init (all should be thread-safe)
40 InitStage cleanup; // all functions called during cleanup (all should be thread-safe)
41
42 bool initFailure = false; // set on failure (throwing through threads isn't a good idea)
43
44 private:
45 Logger logger;
46 const FAIL_MSG = "Init function failed: ";
47 // Template to call function, catching exceptions:
48 void initInput(alias Func) () {
49 try {
50 Func();
51 } catch (Exception e) {
52 logger.fatal (FAIL_MSG ~ e.msg);
53 initFailure = true;
54 }
55 }