bc84d094cd
The following changes are focused upon: - Modularity - Doing away with globals - No heap allocations - Better command line interface - Switch from Xlib to XCB - More verbose type definitions - Implement a single-file config by utilising X-macros
56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
#include "timer.h"
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#include <errno.h>
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#include <stdio.h>
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#include <unistd.h>
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#include "block.h"
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#include "main.h"
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#include "util.h"
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static unsigned int compute_tick(void) {
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unsigned int tick = 0;
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for (unsigned short i = 0; i < LEN(blocks); ++i) {
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const block *const block = &blocks[i];
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tick = gcd(block->interval, tick);
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}
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return tick;
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}
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static unsigned int compute_reset_value(void) {
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unsigned int reset_value = 1;
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for (unsigned short i = 0; i < LEN(blocks); ++i) {
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const block *const block = &blocks[i];
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reset_value = MAX(block->interval, reset_value);
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}
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return reset_value;
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}
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timer timer_new(void) {
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timer timer = {
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.time = 0,
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.tick = compute_tick(),
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.reset_value = compute_reset_value(),
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};
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return timer;
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}
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int timer_arm(timer *const timer) {
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errno = 0;
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(void)alarm(timer->tick);
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if (errno != 0) {
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(void)fprintf(stderr, "error: could not arm timer\n");
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return 1;
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}
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// Wrap `time` to the interval [1, reset_value].
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timer->time = (timer->time + timer->tick) % timer->reset_value + 1;
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return 0;
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}
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