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Prevent writing of stale output to status when multiple signals are fired in a quick succession

This commit is contained in:
Utkarsh Verma 2021-10-14 14:43:07 +05:30
parent 034f33bc41
commit 770742a8ee
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GPG Key ID: 817656CF818EFCCC
1 changed files with 10 additions and 2 deletions
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12
main.c
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@ -25,6 +25,7 @@ static Window root;
static char outputs[LEN(blocks)][CMDLENGTH + 2];
static char statusBar[2][LEN(blocks) * ((LEN(outputs[0]) - 1) + (LEN(DELIMITER) - 1)) + 1];
static int statusContinue = 1;
static volatile sig_atomic_t updatedBlocks = 0;
void (*writeStatus)();
static int pipeFD[2];
@ -141,8 +142,15 @@ void childHandler() {
output[0] = blocks[i].signal;
output++;
}
strcpy(output, buffer);
writeStatus();
// Don't write stale output from the pipe. This only happens when signals
// are received in a rapid succession.
if ((updatedBlocks & (1 << i)) == 0) {
updatedBlocks |= 1 << i;
strcpy(output, buffer);
writeStatus();
}
updatedBlocks &= ~(1 << i);
}
void setupSignals() {