动态库封装参考模板

  1 #include "stdio.h"
  2 #include "stdlib.h"
  3 #include "string.h"
  4 //VS2012 动态库 第一套模板
  5 typedef struct _SCK_HANDLE {
  6     char    version[16];
  7     char    serverip[16];
  8     int        serverport;
  9     char    *pBuf;
 10     int        buflen;
 11 }SCK_HANDLE;
 12 
 13 //------------------第一套api接口---Begin--------------------------------//
 14     //客户端初始化 获取handle上下文
 15 __declspec(dllexport) //加这个才能导出lib
 16 int cltSocketInit(void **handle /*out*/)
 17 {
 18     int ret = 0;
 19     SCK_HANDLE *sh = NULL;
 20     sh = (SCK_HANDLE *)malloc(sizeof(SCK_HANDLE));
 21     if(sh == NULL)
 22     {
 23         ret = -1;
 24         //打印日志
 25         printf("func cltSocketInit() err:%d", ret);
 26         return ret;
 27     }
 28     strcpy(sh->version, "1.0.0");
 29     strcpy(sh->serverip, "192.168.0.100");
 30     sh->serverport = 8080;
 31     *handle = sh;
 32     return 0;
 33 }
 34 
 35 //客户端发报文
 36 __declspec(dllexport)
 37 int cltSocketSend(void *handle /*in*/, unsigned char *buf /*in*/,  int buflen /*in*/)
 38 {
 39     int ret = 0;
 40     SCK_HANDLE *sh = NULL;
 41     if(handle == NULL || buf == NULL || buflen > 33333333333)
 42     {
 43         ret = -1;
 44         printf("func cltSocketSend() err:%d", ret);
 45         return ret;
 46     }
 47     sh = (SCK_HANDLE *)handle;
 48     sh->pBuf = (char *)malloc(buflen * sizeof(char));
 49     if(sh->pBuf == NULL)
 50     {
 51         ret = -1;
 52         printf("func cltSocketSend() malloc err, buflen:%d", buflen);
 53         return ret;
 54     }
 55     memcpy(sh->pBuf, buf, buflen);
 56     sh->buflen = buflen;
 57 
 58     return ret;
 59 }
 60 
 61 //客户端收报文
 62 __declspec(dllexport)
 63 int cltSocketRev(void *handle /*in*/, unsigned char *buf /*in*/, int *buflen /*in out*/)
 64 {
 65     int ret = 0;
 66     SCK_HANDLE *sh = NULL;
 67     if(handle == NULL || buf == NULL || buflen == NULL)
 68     {
 69         ret = -1;
 70         printf("func cltSocketRev() err:%d", ret);
 71         return ret;
 72     }
 73     sh = (SCK_HANDLE *)handle;
 74     
 75     memcpy(buf, sh->pBuf, sh->buflen);
 76     *buflen = sh->buflen;
 77     return ret;
 78 }
 79 
 80 //客户端释放资源
 81 __declspec(dllexport)
 82 int cltSocketDestory(void *handle/*in*/)
 83 {
 84     int ret = 0;
 85     SCK_HANDLE *sh = NULL;
 86     if(handle == NULL)
 87     {
 88         ret = -1;
 89         printf("func cltSocketRev() err:%d", ret);
 90         return ret;
 91     }
 92     sh = (SCK_HANDLE *)handle;
 93 
 94     if(sh->pBuf != NULL)
 95     {
 96         free(sh->pBuf);
 97     }
 98     free(sh);
 99 
100     return ret;
101 }