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Replace mentions of "writer" threads with "worker" threads

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This commit is contained in:
Petar Kapriš 2025-10-24 10:20:20 +02:00
parent b2249f6639
commit baead47f04
1 changed files with 20 additions and 20 deletions
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40
mandelbrot-visualizer.c
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@ -31,7 +31,7 @@ struct threadInfo {
/*
* Concurrency model explained:
* One main thread, along with many workers in a thread pool, who split the work of
* rendering roughly equally. The writers don't do any work until the pixel map which they
* rendering roughly equally. The workers don't do any work until the pixel map which they
* are meant to work on is marked as available, and they are all singalled to start
* drawing.
*
@ -84,7 +84,7 @@ void color_lookup(int *r, int *g, int *b, double mu);
// worker code
gboolean queue_redraw_plane(void *arg);
void *writer_thread(void *arg)
void *worker_thread(void *arg)
{
struct threadInfo *info = arg;
while (true) {
@ -121,7 +121,7 @@ void draw_mandelbrot(struct threadInfo *info)
pthread_mutex_unlock(&pixmapMutex);
return;
// after this, the thread will again enter the
// loop in the writer_thread function, and
// loop in the worker_thread function, and
// enter a wait state
}
pthread_mutex_unlock(&pixmapMutex);
@ -138,13 +138,13 @@ void draw_mandelbrot(struct threadInfo *info)
}
pthread_mutex_lock(&pixmapMutex);
info->complete = true;
bool allWritersComplete = true;
bool allWorkersComplete = true;
for (int32_t i = 0; i < thread_count; i++) {
if (!threads[i].complete) {
allWritersComplete = false;
allWorkersComplete = false;
}
}
if (allWritersComplete) {
if (allWorkersComplete) {
cairo_surface_mark_dirty(surface);
g_main_context_invoke(NULL, queue_redraw_plane, NULL);
}
@ -259,7 +259,7 @@ int main(int argc, char **argv)
// integer, if the thread fails to start, it will simply be
// overwritten by the same value in the next run of the loop
pthread_t id;
if (pthread_create(&id, NULL, &writer_thread, &threads[count])) {
if (pthread_create(&id, NULL, &worker_thread, &threads[count])) {
pthread_detach(id);
fprintf(stderr, "Failed to create thread %d\n", i);
continue;
@ -335,15 +335,15 @@ static void app_activate(GApplication *app)
gboolean queue_redraw_plane(void *arg)
{
(void) arg;
bool allWritersHadCompleted = true;
bool allWorkersHadCompleted = true;
for (int32_t i = 0; i < thread_count; i++) {
if (!threads[i].complete) {
allWritersHadCompleted = false;
allWorkersHadCompleted = false;
break;
}
}
if (!allWritersHadCompleted) {
if (!allWorkersHadCompleted) {
return G_SOURCE_REMOVE;
}
@ -357,14 +357,14 @@ void blit_plane(GtkDrawingArea *da, cairo_t *cr, int width, int height, gpointer
(void) width;
(void) height;
(void) data;
bool allWritersHadCompleted = true;
bool allWorkersHadCompleted = true;
for (int32_t i = 0; i < thread_count; i++) {
if (!threads[i].complete) {
allWritersHadCompleted = false;
allWorkersHadCompleted = false;
break;
}
}
if (allWritersHadCompleted) {
if (allWorkersHadCompleted) {
cairo_set_source_surface(cr, surface, 0, 0);
cairo_paint(cr);
}
@ -382,27 +382,27 @@ void create_surface(GtkWidget *widget)
pixmapAvailable = false; // Mark drawing area as unavailable
pthread_mutex_unlock(&pixmapMutex);
bool allWritersStopped;
bool allWorkersStopped;
do { // Wait until all writing threads have been stopped
allWritersStopped = true;
allWorkersStopped = true;
for (int32_t i = 0; i < thread_count; i++) {
if (threads[i].drawing) {
allWritersStopped = false;
allWorkersStopped = false;
break;
}
}
} while (!allWritersStopped);
} while (!allWorkersStopped);
// If all drawers hadn't completed, we need to call
// cairo_surface_mark_dirty in the main thread
bool allWritersHadCompleted = true;
bool allWorkersHadCompleted = true;
for (int32_t i = 0; i < thread_count; i++) {
if (!threads[i].complete) {
allWritersHadCompleted = false;
allWorkersHadCompleted = false;
break;
}
}
if (!allWritersHadCompleted && surface != NULL) {
if (!allWorkersHadCompleted && surface != NULL) {
cairo_surface_mark_dirty(surface);
}