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annotate termhelper.c @ 1971:80920c21bb52

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Add an event log soft flush and call it twice per frame in between hard flushes to netplay latency when there are insufficient hardware updates to flush packets in the middle of a frame
author Michael Pavone <pavone@retrodev.com>
date Fri, 08 May 2020 11:40:30 -0700
parents 792be135d3af
children
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rev   line source
794
792be135d3af Spawn a terminal for the debugger when needed if we are not already attached to one
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1 #include <sys/types.h>
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2 #include <sys/stat.h>
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3 #include <fcntl.h>
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4 #include <unistd.h>
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5 #include <stdlib.h>
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6 #include "terminal.h"
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7
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8 char buf[4096];
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9
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10 void copy_data(int to, int from)
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11 {
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12 ssize_t bytes = read(from, buf, sizeof(buf));
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13 while (bytes > 0)
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14 {
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15 ssize_t written = write(to, buf, bytes);
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16 if (written == -1) {
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17 exit(1);
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18 }
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19 bytes -= written;
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20 }
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21 }
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22
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23 int main(int argc, char **argv)
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24 {
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25 //these will block so order is important
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26 int input_fd = open(INPUT_PATH, O_WRONLY);
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27 int output_fd = open(OUTPUT_PATH, O_RDONLY);
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28 fd_set read_fds;
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29 FD_ZERO(&read_fds);
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30 for (;;)
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31 {
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32 FD_SET(STDIN_FILENO, &read_fds);
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33 FD_SET(output_fd, &read_fds);
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34 select(output_fd+1, &read_fds, NULL, NULL, NULL);
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35
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36 if (FD_ISSET(STDIN_FILENO, &read_fds)) {
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37 copy_data(input_fd, STDIN_FILENO);
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38 }
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39 if (FD_ISSET(output_fd, &read_fds)) {
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40 copy_data(STDOUT_FILENO, output_fd);
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41 }
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42 }
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43 return 0;
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44 }