add threadpool server

.vscode/settings.json

@@ -3,6 +3,7 @@
         "_GNU_SOURCE"
     ],
     "files.associations": {
-        "socket_wrapper.h": "c"
+        "socket_wrapper.h": "c",
+        "stdalign.h": "c"
     }
 }

Makefile

@@ -13,7 +13,7 @@ socket_wrapper.o: socket_wrapper.c socket_wrapper.h
 client: socket_wrapper.o client.c
 	$(CC) -o client client.c socket_wrapper.o $(CFLAGS)
 server:  socket_wrapper.o server.c
-	$(CC) -o server server.c socket_wrapper.o $(CFLAGS)
+	$(CC) -o server server.c socket_wrapper.o $(CFLAGS) -pthread
 p-server: socket_wrapper.o p-server.c
 	$(CC) -o p-server p-server.c socket_wrapper.o $(CFLAGS)
 p-client: socket_wrapper.o p-client.c

README.md

@@ -15,9 +15,16 @@ Server OPTION and arguments:
 - `-h`        :print help message.
 
 Available macro:
-- DEFAULT_SERVER_PORT : 9091
+For server
-- DEFAULT_MAX_PATH_SIZE : 256(must be less than 1000)
+- DEFAULT_MAX_LISTEN_SOCKET: 16
-- TIMEOUT : 5(second unit)
+- DEFAULT_SERVER_PORT: 9091
+- DEFAULT_MAX_PATH_SIZE: 256(must be less than 1000)
 - USE_SENDFILE
-    - DEFAULT_SEND_FILE_CHUNK_SIZE : 0x100000(1MB)
+    - DEFAULT_SEND_FILE_CHUNK_SIZE: 0x100000(1MB)
-- SLOW_CLIENT(second unit)
+- DEFAULT_WORK_QUEUE_SIZE: 10
+- DEFAULT_MAX_THREAD_NUMBER: 10
+For client
+- SLOW_CLIENT(second unit)
+- DEFAULT_PROGRESS_BAR_WIDTH: 30
+For both
+- TIMEOUT: 5(second unit)

p-client.c

@@ -28,8 +28,11 @@ static const int TIMEOUT = 5;
 #else
 static const int TIMEOUT = DEFAULT_TIMEOUT;
 #endif
-
+#ifndef DEFAULT_PROGRESS_BAR_WIDTH
 static const int PROGRESS_BAR_WIDTH = 30;
+#else
+static const int PROGRESS_BAR_WIDTH = DEFAULT_PROGRESS_BAR_WIDTH;
+#endif
 /*========
  *Operation
  *========*/
@@ -67,7 +70,7 @@ void DisplayProgressBar(size_t offset,size_t total,double cur_progress){
             buf[i] = '=';
         else if(i == cur_pos)
             buf[i] = '>';
-        else buf[i] = ' ';
+        else buf[i] = '.';
     }
     printf("\r[%s]: %.2f%% bytes: %ld/%ld bytes",buf,cur_progress,total,offset);
 }

p-server.c

@@ -272,8 +272,8 @@ int main(int argc, const char *argv[]){
             perror("accept error");
             return 1;
         }
-        msg = inet_ntop(AF_INET,&addr.sin_addr,ip_buf,sizeof(ip_buf));
+        msg = inet_ntop(AF_INET,&client_addr.sin_addr,ip_buf,sizeof(ip_buf));
-        fprintf(stderr,"Connected on : %s:%d\n",msg == NULL ? "(null)" : msg , ntohs(addr.sin_port));
+        fprintf(stderr,"Connected on : %s:%d\n",msg == NULL ? "(null)" : msg , ntohs(client_addr.sin_port));
         pid = fork();
         if(pid == 0){
             if((fd = read_request(csock,buf,bufsize)) > 0){

pstest.sh

@@ -1,3 +1,3 @@
 #! /bin/bash
 cd server_test
-./p-server
+./server

server.c

@@ -12,8 +12,16 @@
 #include <signal.h>
 #include <assert.h>
 #include <fcntl.h>
-#include "socket_wrapper.h"
+#include <pthread.h>
 
+#include "socket_wrapper.h"
+#include "simple_circular_buffer.h"
+
+#ifndef DEFAULT_MAX_LISTEN_SOCKET
+static const int MAX_LISTEN_SOCKET = 16;
+#else
+static const int MAX_LISTEN_SOCKET = DEFAULT_MAX_LISTEN_SOCKET;
+#endif
 #ifdef USE_SENDFILE
 #include <sys/sendfile.h>
 #ifndef DEFAULT_SEND_FILE_CHUNK_SIZE
@@ -39,6 +47,19 @@ static const int TIMEOUT = 5;
 static const int TIMEOUT = DEFAULT_TIMEOUT;
 #endif
 
+enum{
+#ifndef DEFAULT_WORK_QUEUE_SIZE
+ WORK_QUEUE_SIZE = 10,
+ #else
+ WORK_QUEUE_SIZE = DEFAULT_WORK_QUEUE_SIZE,
+#endif
+#ifndef DEFAULT_MAX_THREAD_NUMBER
+ MAX_THREAD_NUMBER = 10
+ #else
+ MAX_THREAD_NUMBER = DEFAULT_MAX_THREAD_NUMBER
+#endif
+};
+
 /*========
  *Operation
  *========*/
@@ -204,18 +225,83 @@ int parse_args(int argc,const char * argv[] , in_port_t * port){
     }
     return 0;
 }
+//============
+//Simple Thread Pool
+//============
+typedef struct SharedState{
+    //empty if less than 0
+    queue_struct(int,WORK_QUEUE_SIZE) socks;
+    pthread_mutex_t sock_mutex;
+    pthread_cond_t ready;
+    //int progress[MAX_THREAD_NUMBER];
+} shared_state_t;
+
+void init_shared_state(shared_state_t * state) {
+    queue_init(&state->socks);
+    pthread_mutex_init(&state->sock_mutex,NULL);
+    pthread_cond_init(&state->ready,NULL);
+}
+//
+typedef struct WorkerArgument
+{
+    int id;
+    int bufsize;
+    uint8_t * buf;
+
+    //pthread_mutex_t * cond_mutex;
+    //pthread_cond_t cond;
+
+} worker_argument_t;
+
+__attribute__((malloc)) worker_argument_t * create_worker_argument(int id, int bufsize){
+    worker_argument_t * ret = (worker_argument_t *)malloc(sizeof(worker_argument_t));
+    if (ret == NULL) return ret;
+    ret->id = id;
+    ret->bufsize = bufsize;
+    ret->buf = (uint8_t *)malloc(sizeof(*ret->buf)*bufsize);
+    if(ret->buf == NULL){
+        free(ret);
+        ret = NULL;
+    }
+    return ret;
+}
+
+static shared_state_t globalState;
+
+void * worker_proc(void * data){
+    worker_argument_t * args = (worker_argument_t *)data;
+    int fd, csock;
+    for(;;){
+        pthread_mutex_lock(&globalState.sock_mutex);
+        while (queue_isempty(&globalState.socks)){
+            pthread_cond_wait(&globalState.ready,&globalState.sock_mutex);
+        }
+        csock = dequeue(&globalState.socks);
+        pthread_mutex_unlock(&globalState.sock_mutex);
+        if((fd = read_request(csock,args->buf,args->bufsize)) > 0){
+            send_response(csock,fd,args->buf,args->bufsize);
+            close(fd);
+        }
+
+        if(close(csock) < 0)
+            perror("csock close error");
+    }
+}
+
+
+static pthread_t worker_threads[MAX_THREAD_NUMBER];
 
 static int sock;
 void safe_exit(){
     close(sock);
 }
 int main(int argc, const char *argv[]){
-    uint8_t * buf;
     struct sockaddr_in addr;
     struct sockaddr_in client_addr;
     socklen_t client_addr_len = sizeof(client_addr);
     int csock;
     int bufsize;
+    int i;
     in_port_t binding_port_number = SERVER_PORT;
     if (argc > 1){
         int d = parse_args(argc,argv,&binding_port_number);
@@ -234,11 +320,15 @@ int main(int argc, const char *argv[]){
             perror("setsockopt");
         }
     }
+    init_shared_state(&globalState);
     bufsize = getBufferSizeFrom(sock);
-    buf = malloc(bufsize * sizeof(*buf));
+    for (i = 0; i < MAX_THREAD_NUMBER; i++) {
-    if (buf == NULL){
+        worker_argument_t * args = create_worker_argument(i,bufsize);
-        fprintf(stderr,"lack of memory");
+        if (args == NULL) {
-        return 1;
+            fprintf(stderr,"malloc: lack of memory");
+            return 1;
+        }
+        pthread_create(&worker_threads[i],NULL,worker_proc,args);
     }
     
     addr.sin_addr.s_addr = htonl(INADDR_ANY); /*0.0.0.0 모든 네트워크 인터페이스에 묶임.*/
@@ -255,27 +345,33 @@ int main(int argc, const char *argv[]){
         fprintf(stderr,"server bind on %s:%d\n",msg ,binding_port_number);
     }
 
-    if(listen(sock,1) < 0){
+    if(listen(sock,MAX_LISTEN_SOCKET) < 0){
         perror("listen failed");
         return 1;
     }
 
     while ((csock = accept(sock, (struct sockaddr *)&client_addr,&client_addr_len)) >= 0)
     {
-        int fd;
         char ip_buf[INET_ADDRSTRLEN];
-        const char * msg = inet_ntop(AF_INET,&addr.sin_addr,ip_buf,sizeof(ip_buf));
+        const char * msg = inet_ntop(AF_INET,&client_addr.sin_addr,ip_buf,sizeof(ip_buf));
         fprintf(stderr,"Connected on : %s:%d\n",msg == NULL ? "(null)" : msg , ntohs(addr.sin_port));
-        if((fd = read_request(csock,buf,bufsize)) > 0){
+        for(;;){
-            send_response(csock,fd,buf,bufsize);
+            pthread_mutex_lock(&globalState.sock_mutex);
-            close(fd);
+            if (queue_isfull(&globalState.socks)){
+                pthread_mutex_unlock(&globalState.sock_mutex);
+#ifdef _GNU_SOURCE
+                pthread_yield();
+#else
+                usleep(400);
+#endif    
+                continue;
+            }
+            else enqueue(&globalState.socks,csock);
+            break;
         }
-
+        pthread_mutex_unlock(&globalState.sock_mutex);
-        if(close(csock) < 0)
+        pthread_cond_signal(&globalState.ready);
-            perror("csock close error");
-
     }
-    free(buf);
+    
-    perror("accept error");
     return 1;
 }

simple_circular_buffer.h

@@ -0,0 +1,30 @@
+#ifndef _SIMPLE_CIRCULAR_BUFFER_
+#define _SIMPLE_CIRCULAR_BUFFER_
+
+#include<stddef.h>
+
+#define queue_struct(queue_type,queue_size) struct{\
+queue_type data [(queue_size)+1];\
+size_t begin;\
+size_t end;\
+}
+
+#define queue_size(queue) ((sizeof((queue)->data)/sizeof((queue)->data[0])) - 1)
+#define queue_isempty(queue) ((queue)->begin == (queue)->end)
+#define queue_isfull(queue) ((queue)->begin == (((queue)->end + 1) % queue_size(queue)))
+
+#define queue_init(queue) do{\
+    (queue)->begin = 0;\
+    (queue)->end = 0;\
+}while(0)
+//unchecked
+#define enqueue(queue,element) do{ \
+    (queue)->data[(queue)->end] = (element);\
+    (queue)->end = ((queue)->end + 1) % (queue_size(queue) + 1);\
+}while(0)
+//unchecked
+#define dequeue(queue) \
+(((queue)->begin = ((queue)->begin + 1) % (queue_size(queue) + 1)) ,\
+(queue)->data[((queue)->begin + queue_size(queue)) % (queue_size(queue) + 1)])
+
+#endif 

socket_wrapper.c

@@ -26,21 +26,32 @@ ssize_t timeout_recv(int fd,void * buf,size_t n,int timeout)
 {
     ssize_t ret = 0;
     int poll_ret;
+    int try = 0;
     struct pollfd fd_single;
-    fd_single.fd = fd;
+    timeout = timeout * 1000;
-    fd_single.events = POLL_IN;
+    if (n == 0) return 0;
-    poll_ret = (poll(&fd_single,1,timeout * 1000));
+    for(;;){
-    if (poll_ret < 0) return -1;
+        fd_single.fd = fd;
-    else if(poll_ret == 0) return -2;
+        fd_single.events = POLL_IN;
-    if (fd_single.revents & POLLHUP) //We'll treat hangups state like timeouts state.
+        poll_ret = (poll(&fd_single,1,timeout));
-        return -2;
+        if (poll_ret < 0){  fprintf(stderr,"timeout %d\n",timeout); return -1;}
-    if ((fd_single.revents & POLLERR) || (fd_single.revents & POLLNVAL))
+        else if(poll_ret == 0) return -2;
-        return -1;
+        if (fd_single.revents & POLLHUP) //We'll treat hangups state like timeouts state.
-    if (fd_single.revents & POLL_IN)
+            return -2;
-        ret = recv(fd,buf,n,0);
+        if ((fd_single.revents & POLLERR) || (fd_single.revents & POLLNVAL))
-        assert(ret != 0);
+            return -1;
-        return ret;
+        if (fd_single.revents & POLL_IN){
-    
+            ret = recv(fd,buf,n,0);
+            if(ret != 0) return ret;
+            //try 3 times
+            if (try < 3){
+                try++;
+                timeout /= 2;
+                continue;
+            }
+            return -2;
+        }
+    }
     assert(0 && "unreachable");
 }