44 lines
1.0 KiB
C
44 lines
1.0 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <pthread.h>
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#include <sched.h>
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#include <sys/syscall.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <stdint.h>
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#include <signal.h>
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#include <linux/input.h>
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#include <math.h>
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#include <sys/ioctl.h>
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#include <sys/poll.h>
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#include <sys/time.h>
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#include <string.h>
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int *switch_video;
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int *switch_memory_open(void) {
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char buf[128];
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int fd;
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sprintf(buf, "/video_switch");
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fd = shm_open(buf, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR);
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if(fd < 0) { perror("shm_open"); exit(1); }
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if (ftruncate(fd, 4096) == -1) { perror("ftruncate"); exit(1); }
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int *retval = mmap(NULL, 4096, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
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return retval;
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}
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void main()
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{
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switch_video = switch_memory_open();
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}
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