Mercurial > repos > blastem
annotate termhelper.c @ 1971:80920c21bb52
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> |
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date | Fri, 08 May 2020 11:40:30 -0700 |
parents | 792be135d3af |
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rev | line source |
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794
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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1 #include <sys/types.h> |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
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2 #include <sys/stat.h> |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
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3 #include <fcntl.h> |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
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4 #include <unistd.h> |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
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parents:
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5 #include <stdlib.h> |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
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6 #include "terminal.h" |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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7 |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
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8 char buf[4096]; |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
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9 |
792be135d3af
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10 void copy_data(int to, int from) |
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Michael Pavone <pavone@retrodev.com>
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11 { |
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12 ssize_t bytes = read(from, buf, sizeof(buf)); |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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13 while (bytes > 0) |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
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14 { |
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15 ssize_t written = write(to, buf, bytes); |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
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16 if (written == -1) { |
792be135d3af
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Michael Pavone <pavone@retrodev.com>
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17 exit(1); |
792be135d3af
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18 } |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
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19 bytes -= written; |
792be135d3af
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Michael Pavone <pavone@retrodev.com>
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20 } |
792be135d3af
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Michael Pavone <pavone@retrodev.com>
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21 } |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
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22 |
792be135d3af
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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); |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
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27 int output_fd = open(OUTPUT_PATH, O_RDONLY); |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
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28 fd_set read_fds; |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
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29 FD_ZERO(&read_fds); |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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30 for (;;) |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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31 { |
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32 FD_SET(STDIN_FILENO, &read_fds); |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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33 FD_SET(output_fd, &read_fds); |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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34 select(output_fd+1, &read_fds, NULL, NULL, NULL); |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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35 |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
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36 if (FD_ISSET(STDIN_FILENO, &read_fds)) { |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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37 copy_data(input_fd, STDIN_FILENO); |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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38 } |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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39 if (FD_ISSET(output_fd, &read_fds)) { |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
diff
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40 copy_data(STDOUT_FILENO, output_fd); |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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41 } |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
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42 } |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
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43 return 0; |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
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44 } |