xf.li | 6c8fc1e | 2023-08-12 00:11:09 -0700 | [diff] [blame] | 1 | #include <errno.h> |
| 2 | #include <stdio.h> |
| 3 | #include <stdlib.h> |
| 4 | #include <string.h> |
| 5 | #include <unistd.h> |
| 6 | #include <signal.h> |
| 7 | #include <time.h> |
| 8 | #include <pthread.h> |
| 9 | #include <sys/prctl.h> |
| 10 | #include <sys/ipc.h> |
| 11 | #include <sys/shm.h> |
| 12 | #include <sys/types.h> |
| 13 | #include <unistd.h> |
| 14 | #include <assert.h> |
| 15 | #include <sys/mman.h> |
| 16 | #include <sys/stat.h> |
| 17 | #include <fcntl.h> |
| 18 | |
| 19 | /** |
| 20 | * ºê¶¨Òå |
| 21 | */ |
| 22 | #define SHM_TEXT_SIZE (8192) |
| 23 | #define SHM_PAGE_SIZE (4096) |
| 24 | #define SHM_ALLOC_ONE_PAGE_SIZE (1024) |
| 25 | #define SHM_ALLOC_TWO_PAGE_SIZE (8100) |
| 26 | #define SHM_ALLOC_FOUR_PAGE_SIZE (16000) |
| 27 | |
| 28 | typedef struct |
| 29 | { |
| 30 | key_t key; |
| 31 | int shmid; |
| 32 | unsigned int shm_size; |
| 33 | }shm_node_t; |
| 34 | |
| 35 | typedef struct |
| 36 | { |
| 37 | int write; |
| 38 | char data[SHM_TEXT_SIZE]; |
| 39 | }shm_use_remote; |
| 40 | |
| 41 | shm_node_t shm_node; |
| 42 | |
| 43 | int main (int argc, char *argv[]) |
| 44 | { |
| 45 | int opt; |
| 46 | int ret = 0; |
| 47 | int shmid = 0; |
| 48 | unsigned int shm_size = 0; |
| 49 | key_t key = 0; |
| 50 | char *pshm = NULL; |
| 51 | char *read_data = NULL; |
| 52 | extern char *optarg; |
| 53 | |
| 54 | shm_use_remote *shared; |
| 55 | |
| 56 | while ((opt = getopt(argc,argv,"k:d:s::")) != EOF) |
| 57 | { |
| 58 | switch (opt) |
| 59 | { |
| 60 | case 'k': |
| 61 | key = atoi(optarg); |
| 62 | break; |
| 63 | case 'd': |
| 64 | read_data = optarg; |
| 65 | break; |
| 66 | case 's': |
| 67 | shm_size = atoi(optarg); |
| 68 | break; |
| 69 | default: |
| 70 | break; |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | if (key == 0 || !read_data) |
| 75 | { |
| 76 | printf("param error: you can input \"shm_read -k -200 -d \"123456\" -s1024 \n"); |
| 77 | printf("or \"shm_read -k -200 -d \"123456\" \n"); |
| 78 | printf("-k -200: create a shm using key -200\n"); |
| 79 | printf("-d \"123456\": if we write 123456 to shm, then can read 123456 form shm, the test case is pass! \n"); |
| 80 | printf("-s1024: set the size of shm, then the default size is 1024 \n"); |
| 81 | return -1; |
| 82 | } |
| 83 | |
| 84 | if (shm_size == 0) |
| 85 | shm_size = SHM_ALLOC_ONE_PAGE_SIZE; |
| 86 | |
| 87 | printf("AP read test: key is %d, shm_size is %d\n", key, shm_size); |
| 88 | |
| 89 | shmid = shmget(key, shm_size, 0666|IPC_CREAT); |
| 90 | if(shmid < 0) |
| 91 | { |
| 92 | printf("shmid return error\n"); |
| 93 | return -1; |
| 94 | } |
| 95 | |
| 96 | pshm = (char *)shmat(shmid, 0, 0); |
| 97 | if (pshm == NULL) |
| 98 | { |
| 99 | printf("shmat return error\n"); |
| 100 | return -1; |
| 101 | } |
| 102 | shm_node.key = key; |
| 103 | shm_node.shm_size = shm_size; |
| 104 | |
| 105 | shared = (shm_use_remote *)pshm; |
| 106 | shared->write = 1; |
| 107 | |
| 108 | while(1) |
| 109 | { |
| 110 | if(strncmp(shared->data, read_data, sizeof(read_data)) == 0) |
| 111 | { |
| 112 | printf("Success, AP read %s from shm\n", read_data); |
| 113 | break; |
| 114 | } |
| 115 | else |
| 116 | sleep(2); |
| 117 | } |
| 118 | |
| 119 | if(shmdt(pshm) < 0) |
| 120 | { |
| 121 | printf("shmdt errno %d: %s\n", errno, strerror(errno)); |
| 122 | return -1; |
| 123 | } |
| 124 | |
| 125 | if(shmctl(shmid, IPC_RMID, NULL) == -1) |
| 126 | { |
| 127 | printf("shmctl errno %d: %s\n", errno, strerror(errno)); |
| 128 | return -1; |
| 129 | } |
| 130 | |
| 131 | printf("shm read end\n"); |
| 132 | return 0; |
| 133 | } |
| 134 | |