add CircularBuffer

my_malloc.c

@@ -0,0 +1,69 @@
+
+/***************************************************************************
+* @file:my_malloc.c 
+* @author:   
+* @date:  4,11,2019
+* @brief:  对malloc系列函数进行封装，方便查找内存泄露位置
+* @attention:
+***************************************************************************/
+#include <stdlib.h>
+#include <string.h>
+
+#include "my_malloc.h"
+
+//用来存储每次 malloc 的相关信息
+malloc_mem_info_t *malloc_mem_info = NULL;
+
+int my_malloc_init(void)
+{
+	malloc_mem_info = (malloc_mem_info_t*)calloc(MAX_MALLOC_TIMES*sizeof(malloc_mem_info_t),sizeof(char));
+	if(NULL == malloc_mem_info) 
+		return -1;
+
+	return 0;
+}
+
+static int malloc_index = 0;
+/*******************************************************************************
+*@ Description    :
+*@ Input          :<size> 需求内存大小
+					<file_line> 文件名和行号，格式 "my_malloc.c:66"
+								传入 __FILE__:__LINE__ 即可
+*@ Output         :
+*@ Return         :成功 ：返回地址 ；失败：NULL
+*@ attention      :
+*******************************************************************************/
+void * my_malloc(int size,char* file_name)
+{
+	void * ptr = malloc(size);
+	if(ptr)
+	{
+		//记录返回的地址，统一管理
+		malloc_mem_info[malloc_index].address = ptr;
+		strncpy(malloc_mem_info[malloc_index].file_line,file_name,sizeof(malloc_mem_info.file_line));
+		malloc_index++;
+		return ptr;
+	}
+	else
+	{
+		return NULL;
+	}
+
+}
+
+void my_free(void *ptr)
+{
+
+}
+void * my_calloc(int nmemb, int size)
+{
+
+}
+
+void * my_realloc(void *ptr, int size)
+{
+
+
+}
+
+

my_malloc.h

@@ -0,0 +1,23 @@
+
+/***************************************************************************
+* @file:my_malloc.h 
+* @author:   
+* @date:  4,11,2019
+* @brief:  对malloc系列函数进行封装，方便查找内存泄露位置
+* @attention:
+***************************************************************************/
+
+#ifndef _MY_MALLOC_H
+#define _MY_MALLOC_H
+
+#define MAX_MALLOC_TIMES 	600  //最大的malloc次数（泛指 malloc calloc realloc 操作次数）
+// 600 * 36/1024 = 21 kB 大小
+typedef struct _malloc_mem_info_t
+{
+	void* address;				//malloc空间的地址记录
+	char file_line[32];			//记录文件名和行号，格式 my_malloc.c:66(代表在my_malloc.c文件66行处的malloc内存没有释放)
+}malloc_mem_info_t;
+
+
+
+#endif

tools_data_struct/select/client.c

@@ -0,0 +1,52 @@
+/*********************************************************
+				select()实现多路复用的客户端程序
+1.	create socket
+2.	connect		
+3.	send
+4.	recv
+*********************************************************/
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>          /* See NOTES */
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#define BUF_SIZE 100
+
+int main()
+{
+	//create socket
+	int iClient = socket(AF_INET, SOCK_STREAM, 0);//SOCK_STREAM:流式套接字，TCP协议用
+	if (-1 == iClient)
+	{
+		return -1;
+	}
+	printf("socket ok\r\n");
+
+	//connect
+	struct sockaddr_in stServer;
+	memset(&stServer, 0, sizeof(struct sockaddr_in));
+	stServer.sin_family = AF_INET;
+	stServer.sin_port = htons(8866);
+	stServer.sin_addr.s_addr = inet_addr("127.0.0.1");
+	int iRet = connect(iClient, (struct sockaddr *)&stServer, sizeof(struct sockaddr));
+	if (-1 == iRet)
+	{
+		perror("connect");
+		return -1;
+	}
+	printf("connect ok\r\n");
+
+	//send
+	char buf[BUF_SIZE] = {0};
+	gets(buf);
+	send(iClient, buf, BUF_SIZE, 0);
+	memset(buf, 0, BUF_SIZE);
+
+	//recv
+	iRet = recv(iClient, buf, BUF_SIZE, 0);
+	printf("%d %s\r\n", iRet, buf);
+	return 0;
+}

tools_data_struct/select/select.c

@@ -0,0 +1,86 @@
+/*********************************************************
+				select()实现多路复用 
+1.	create socket
+2.	bind		
+3.	select
+*********************************************************/
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>          /* See NOTES */
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <sys/select.h>
+#include <sys/time.h>
+
+#define BUF_SIZE 100
+
+int main()
+{
+	//socket
+	int iServer = socket(AF_INET, SOCK_STREAM, 0);
+	if (-1 == iServer)
+	{
+		return -1;
+	}
+	printf("socket ok\r\n");
+
+	//bind
+	struct sockaddr_in stServer;
+	memset(&stServer, 0, sizeof(struct sockaddr_in));
+	stServer.sin_family = AF_INET;
+	stServer.sin_port = htons(8866);
+	stServer.sin_addr.s_addr = INADDR_ANY;
+	int iRet = bind(iServer, (struct sockaddr *)&stServer, sizeof(struct sockaddr_in));
+	if (-1 == iRet)
+	{
+		return -1;
+	}
+	printf("bind ok\r\n");
+
+	//listen
+	iRet = listen(iServer, 5);
+	if (-1 == iRet)
+	{
+		return -1;
+	}
+	printf("listen ok\r\n");
+
+
+	//不同的部分：
+	//select（）
+	fd_set stRSet;//fd_set是一个结构体类型
+	FD_ZERO(&stRSet);//清除stRSet中所有的文件描述
+	char buf[BUF_SIZE];
+	while(1)
+	{
+		FD_SET(0, &stRSet);//0：标准输入，即将标准输入加入到stRSet
+		FD_SET(iServer, &stRSet);//将iServer文件描述符加入到stRSet
+		iRet = select(iServer+1, &stRSet, NULL, NULL, NULL);
+		if (iRet <= 0)
+		{
+			continue;
+		}
+		if (FD_ISSET(iServer, &stRSet))//判断iServer是否在stRSet中
+		{
+			int iClient = accept(iServer, NULL, NULL);
+			if (iClient < 0)
+			{
+				continue;
+			}
+			memset(buf, 0, BUF_SIZE);
+			recv(iClient, buf, BUF_SIZE, 0);
+			printf("iserver %s\r\n", buf);
+			send(iClient, buf, BUF_SIZE, 0);
+			close(iClient);
+		}
+		if (FD_ISSET(0, &stRSet))//判断标准输入是否在stRSet中
+		{
+			memset(buf, 0, BUF_SIZE);
+			fgets(buf, BUF_SIZE, stdin);
+			printf("stdin %s\r\n", buf);
+		}
+	}
+	return 0;
+}