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Fix clock CPU utilization #1656

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Fix clock CPU utilization #1656

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0d3076f
Fix `clock` CPU utilization
MattCatz Aug 23, 2024
e6bd54e
Merge branch 'main' into clock
MattCatz Aug 31, 2024
971ebad
Merge branch 'main' into clock
MattCatz Aug 31, 2024
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2 changes: 1 addition & 1 deletion src/clock/Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@ include ../common/config.mk

TARGET = clock
LDFLAGS := $(LDFLAGS) -lSDL -lpthread -lmi_sys -lmi_gfx
CFLAGS := $(CFLAGS) -I./font -Os -ffunction-sections -fdata-sections
CFLAGS := $(CFLAGS) -I./font -Os -flto -fno-fat-lto-objects

include ../common/commands.mk
include ../common/recipes.mk
11 changes: 10 additions & 1 deletion src/clock/main.c
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Expand Up @@ -39,6 +39,7 @@ SOFTWARE.
#define MAX_SECOND 59
#define MAX_MINUTE MAX_SECOND
#define MAX_HOUR 23
#define MS_TO_US(ms) ms * 1000

SDL_Surface *sdl_screen, *screen;

Expand Down Expand Up @@ -207,9 +208,10 @@ int main(int argc, char *argv[])
&hour_selected, &minute_selected, &seconds_selected);

SDL_EnableKeyRepeat(500, 50);

int dirty = 1; // first draw
while (!quit) {
while (SDL_PollEvent(&event)) {
dirty = 1;
switch (event.type) {
case SDL_KEYUP:
switch (event.key.keysym.sym) {
Expand Down Expand Up @@ -296,6 +298,11 @@ int main(int argc, char *argv[])
}
}

if (dirty != 1) {
usleep(MS_TO_US(100));
continue;
}

Check_leap_year();
Dont_go_over_days();
Dont_go_over_hour();
Expand Down Expand Up @@ -330,6 +337,8 @@ int main(int argc, char *argv[])

/* Flip the screen so it gets displayed*/
GFX_Flip(screen);

dirty = 0;
}

/* Make sure to clean up the allocated surfaces before exiting.
Expand Down
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