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authorJaakko Keränen <jaakko.keranen@iki.fi>2020-09-06 09:27:14 +0300
committerJaakko Keränen <jaakko.keranen@iki.fi>2020-09-06 09:27:14 +0300
commit6bd9fbffec920c103d27bf780d60de314316bbd5 (patch)
treed87aa9226a1a1ed7a6a77652266aae4bbd78cb14 /src/ui/lookupwidget.c
parent8d249e27e6dda6423af93aa4368a81b13cd3f451 (diff)
Added a LookupWidget with background thread
Diffstat (limited to 'src/ui/lookupwidget.c')
-rw-r--r--src/ui/lookupwidget.c134
1 files changed, 134 insertions, 0 deletions
diff --git a/src/ui/lookupwidget.c b/src/ui/lookupwidget.c
new file mode 100644
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--- /dev/null
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1/* Copyright 2020 Jaakko Keränen <jaakko.keranen@iki.fi>
2
3Redistribution and use in source and binary forms, with or without
4modification, are permitted provided that the following conditions are met:
5
61. Redistributions of source code must retain the above copyright notice, this
7 list of conditions and the following disclaimer.
82. Redistributions in binary form must reproduce the above copyright notice,
9 this list of conditions and the following disclaimer in the documentation
10 and/or other materials provided with the distribution.
11
12THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
13ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
14WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
15DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
16ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
17(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
18LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
19ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
20(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
21SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
22
23#include "lookupwidget.h"
24#include "lookup.h"
25#include "listwidget.h"
26
27#include <the_Foundation/mutex.h>
28#include <the_Foundation/thread.h>
29
30iDeclareType(LookupJob)
31
32struct Impl_LookupJob {
33 iString term;
34 iPtrArray results;
35};
36
37static void init_LookupJob(iLookupJob *d) {
38 init_String(&d->term);
39 init_PtrArray(&d->results);
40}
41
42static void deinit_LookupJob(iLookupJob *d) {
43 iForEach(PtrArray, i, &d->results) {
44 delete_LookupResult(i.ptr);
45 }
46 deinit_PtrArray(&d->results);
47 deinit_String(&d->term);
48}
49
50iDefineTypeConstruction(LookupJob)
51
52struct Impl_LookupWidget {
53 iWidget widget;
54 iListWidget *list;
55 iThread *work;
56 iCondition jobAvailable; /* wakes up the work thread */
57 iMutex *mtx;
58 iString nextJob;
59 iLookupJob *finishedJob;
60};
61
62static iThreadResult worker_LookupWidget_(iThread *thread) {
63 iLookupWidget *d = userData_Thread(thread);
64 lock_Mutex(d->mtx);
65 for (;;) {
66 wait_Condition(&d->jobAvailable, d->mtx);
67 if (isEmpty_String(&d->nextJob)) {
68 break; /* Time to quit. */
69 }
70 iLookupJob *job = new_LookupJob();
71 set_String(&job->term, &d->nextJob);
72 clear_String(&d->nextJob);
73 unlock_Mutex(d->mtx);
74 /* Do the lookup. */ {
75
76 }
77 /* Submit the result. */
78 lock_Mutex(d->mtx);
79 if (d->finishedJob) {
80 /* Previous results haven't been taken yet. */
81 delete_LookupJob(d->finishedJob);
82 }
83 d->finishedJob = job;
84 }
85 unlock_Mutex(d->mtx);
86 printf("[LookupWidget] worker has quit\n"); fflush(stdout);
87 return 0;
88}
89
90iDefineObjectConstruction(LookupWidget)
91
92void init_LookupWidget(iLookupWidget *d) {
93 iWidget *w = as_Widget(d);
94 init_Widget(w);
95 setId_Widget(w, "lookup");
96 setFlags_Widget(w, resizeChildren_WidgetFlag, iTrue);
97 d->list = addChild_Widget(w, iClob(new_ListWidget()));
98 d->work = new_Thread(worker_LookupWidget_);
99 setUserData_Thread(d->work, d);
100 init_Condition(&d->jobAvailable);
101 d->mtx = new_Mutex();
102 init_String(&d->nextJob);
103 d->finishedJob = NULL;
104}
105
106void deinit_LookupWidget(iLookupWidget *d) {
107 /* Stop the worker. */ {
108 iGuardMutex(d->mtx, {
109 clear_String(&d->nextJob);
110 signal_Condition(&d->jobAvailable);
111 });
112 join_Thread(d->work);
113 iRelease(d->work);
114 }
115 delete_LookupJob(d->finishedJob);
116 deinit_String(&d->nextJob);
117 delete_Mutex(d->mtx);
118 deinit_Condition(&d->jobAvailable);
119}
120
121static void draw_LookupWidget_(const iLookupWidget *d) {
122 const iWidget *w = constAs_Widget(d);
123 draw_Widget(w);
124}
125
126static iBool processEvent_LookupWidget_(iLookupWidget *d, const SDL_Event *ev) {
127 iWidget *w = as_Widget(d);
128 return processEvent_Widget(w, ev);
129}
130
131iBeginDefineSubclass(LookupWidget, Widget)
132 .draw = (iAny *) draw_LookupWidget_,
133 .processEvent = (iAny *) processEvent_LookupWidget_,
134iEndDefineSubclass(LookupWidget)