在主函数中被调用时,A、 B二处的串口输出信息可以正常输出(程序运行正常).
在线程函数中被调用时,只有A处的串口信息可以正常输出, 但不能运行到B处.(此时,程序运行不正常).
请问, 这是什么原因呢? 这个函数photo_argb_8bpp() 有问题吗?
__s32 photo_argb_8bpp(char *srcdata,char * drcdata,__s32 len)
{
char* date;
__u32 tmp;
__u32 cnt;
char red;
char gre;
char blu;
char alpha;
eLIBs_printf("..%s..%d.....\n", __FILE__, __LINE__); // A
tmp = 0;
date = srcdata;
for (cnt = 0; cnt < len; cnt++)
{
red = *(date + tmp + 0);
gre = *(date + tmp + 1);
blu = *(date + tmp + 2);
*drcdata++ = 0.33*red + 0.33*gre +0.33*blu;
tmp+= 4;
}
eLIBs_printf("..%s..%d.....\n", __FILE__, __LINE__); // B
return 0;
}
6 个解决方案
#1
加临界区锁
参考下面
参考下面
//循环向a函数每次发送200个字节长度(这个是固定的)的buffer,
//a函数中需要将循环传进来的buffer,组成240字节(也是固定的)的新buffer进行处理,
//在处理的时候每次从新buffer中取两个字节打印
#ifdef WIN32
#pragma warning(disable:4996)
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef WIN32
#include <windows.h>
#include <process.h>
#include <io.h>
#define MYVOID void
#define vsnprintf _vsnprintf
#else
#include <unistd.h>
#include <sys/time.h>
#include <pthread.h>
#define CRITICAL_SECTION pthread_mutex_t
#define MYVOID void *
#endif
//Log{
#define MAXLOGSIZE 20000000
#define MAXLINSIZE 16000
#include <time.h>
#include <sys/timeb.h>
#include <stdarg.h>
char logfilename1[]="MyLog1.log";
char logfilename2[]="MyLog2.log";
static char logstr[MAXLINSIZE+1];
char datestr[16];
char timestr[16];
char mss[4];
CRITICAL_SECTION cs_log;
FILE *flog;
#ifdef WIN32
void Lock(CRITICAL_SECTION *l) {
EnterCriticalSection(l);
}
void Unlock(CRITICAL_SECTION *l) {
LeaveCriticalSection(l);
}
void sleep_ms(int ms) {
Sleep(ms);
}
#else
void Lock(CRITICAL_SECTION *l) {
pthread_mutex_lock(l);
}
void Unlock(CRITICAL_SECTION *l) {
pthread_mutex_unlock(l);
}
void sleep_ms(int ms) {
usleep(ms*1000);
}
#endif
void LogV(const char *pszFmt,va_list argp) {
struct tm *now;
struct timeb tb;
if (NULL==pszFmt||0==pszFmt[0]) return;
vsnprintf(logstr,MAXLINSIZE,pszFmt,argp);
ftime(&tb);
now=localtime(&tb.time);
sprintf(datestr,"%04d-%02d-%02d",now->tm_year+1900,now->tm_mon+1,now->tm_mday);
sprintf(timestr,"%02d:%02d:%02d",now->tm_hour ,now->tm_min ,now->tm_sec );
sprintf(mss,"%03d",tb.millitm);
printf("%s %s.%s %s",datestr,timestr,mss,logstr);
flog=fopen(logfilename1,"a");
if (NULL!=flog) {
fprintf(flog,"%s %s.%s %s",datestr,timestr,mss,logstr);
if (ftell(flog)>MAXLOGSIZE) {
fclose(flog);
if (rename(logfilename1,logfilename2)) {
remove(logfilename2);
rename(logfilename1,logfilename2);
}
} else {
fclose(flog);
}
}
}
void Log(const char *pszFmt,...) {
va_list argp;
Lock(&cs_log);
va_start(argp,pszFmt);
LogV(pszFmt,argp);
va_end(argp);
Unlock(&cs_log);
}
//Log}
#define ASIZE 200
#define BSIZE 240
#define CSIZE 2
char Abuf[ASIZE];
char Cbuf[CSIZE];
CRITICAL_SECTION cs_HEX ;
CRITICAL_SECTION cs_BBB ;
struct FIFO_BUFFER {
int head;
int tail;
int size;
char data[BSIZE];
} BBB;
int No_Loop=0;
void HexDump(int cn,char *buf,int len) {
int i,j,k;
char binstr[80];
Lock(&cs_HEX);
for (i=0;i<len;i++) {
if (0==(i%16)) {
sprintf(binstr,"%03d %04x -",cn,i);
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
} else if (15==(i%16)) {
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
sprintf(binstr,"%s ",binstr);
for (j=i-15;j<=i;j++) {
sprintf(binstr,"%s%c",binstr,('!'<buf[j]&&buf[j]<='~')?buf[j]:'.');
}
Log("%s\n",binstr);
} else {
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
}
}
if (0!=(i%16)) {
k=16-(i%16);
for (j=0;j<k;j++) {
sprintf(binstr,"%s ",binstr);
}
sprintf(binstr,"%s ",binstr);
k=16-k;
for (j=i-k;j<i;j++) {
sprintf(binstr,"%s%c",binstr,('!'<buf[j]&&buf[j]<='~')?buf[j]:'.');
}
Log("%s\n",binstr);
}
Unlock(&cs_HEX);
}
int GetFromRBuf(int cn,CRITICAL_SECTION *cs,FIFO_BUFFER *fbuf,char *buf,int len) {
int lent,len1,len2;
lent=0;
Lock(cs);
if (fbuf->size>=len) {
lent=len;
if (fbuf->head+lent>BSIZE) {
len1=BSIZE-fbuf->head;
memcpy(buf ,fbuf->data+fbuf->head,len1);
len2=lent-len1;
memcpy(buf+len1,fbuf->data ,len2);
fbuf->head=len2;
} else {
memcpy(buf ,fbuf->data+fbuf->head,lent);
fbuf->head+=lent;
}
fbuf->size-=lent;
}
Unlock(cs);
return lent;
}
MYVOID thdB(void *pcn) {
char *recv_buf;
int recv_nbytes;
int cn;
int wc;
int pb;
cn=(int)pcn;
Log("%03d thdB thread begin...\n",cn);
while (1) {
sleep_ms(10);
recv_buf=(char *)Cbuf;
recv_nbytes=CSIZE;
wc=0;
while (1) {
pb=GetFromRBuf(cn,&cs_BBB,&BBB,recv_buf,recv_nbytes);
if (pb) {
Log("%03d recv %d bytes\n",cn,pb);
HexDump(cn,recv_buf,pb);
sleep_ms(1);
} else {
sleep_ms(1000);
}
if (No_Loop) break;//
wc++;
if (wc>3600) Log("%03d %d==wc>3600!\n",cn,wc);
}
if (No_Loop) break;//
}
#ifndef WIN32
pthread_exit(NULL);
#endif
}
int PutToRBuf(int cn,CRITICAL_SECTION *cs,FIFO_BUFFER *fbuf,char *buf,int len) {
int lent,len1,len2;
Lock(cs);
lent=len;
if (fbuf->size+lent>BSIZE) {
lent=BSIZE-fbuf->size;
}
if (fbuf->tail+lent>BSIZE) {
len1=BSIZE-fbuf->tail;
memcpy(fbuf->data+fbuf->tail,buf ,len1);
len2=lent-len1;
memcpy(fbuf->data ,buf+len1,len2);
fbuf->tail=len2;
} else {
memcpy(fbuf->data+fbuf->tail,buf ,lent);
fbuf->tail+=lent;
}
fbuf->size+=lent;
Unlock(cs);
return lent;
}
MYVOID thdA(void *pcn) {
char *send_buf;
int send_nbytes;
int cn;
int wc;
int a;
int pa;
cn=(int)pcn;
Log("%03d thdA thread begin...\n",cn);
a=0;
while (1) {
sleep_ms(100);
memset(Abuf,a,ASIZE);
a=(a+1)%256;
if (16==a) {No_Loop=1;break;}//去掉这句可以让程序一直循环直到按Ctrl+C或Ctrl+Break或当前目录下存在文件No_Loop
send_buf=(char *)Abuf;
send_nbytes=ASIZE;
Log("%03d sending %d bytes\n",cn,send_nbytes);
HexDump(cn,send_buf,send_nbytes);
wc=0;
while (1) {
pa=PutToRBuf(cn,&cs_BBB,&BBB,send_buf,send_nbytes);
Log("%03d sent %d bytes\n",cn,pa);
HexDump(cn,send_buf,pa);
send_buf+=pa;
send_nbytes-=pa;
if (send_nbytes<=0) break;//
sleep_ms(1000);
if (No_Loop) break;//
wc++;
if (wc>3600) Log("%03d %d==wc>3600!\n",cn,wc);
}
if (No_Loop) break;//
}
#ifndef WIN32
pthread_exit(NULL);
#endif
}
int main() {
#ifdef WIN32
InitializeCriticalSection(&cs_log);
InitializeCriticalSection(&cs_HEX );
InitializeCriticalSection(&cs_BBB );
#else
pthread_t threads[2];
int threadsN;
int rc;
pthread_mutex_init(&cs_log,NULL);
pthread_mutex_init(&cs_HEX,NULL);
pthread_mutex_init(&cs_BBB,NULL);
#endif
Log("Start===========================================================\n");
BBB.head=0;
BBB.tail=0;
BBB.size=0;
#ifdef WIN32
_beginthread((void(__cdecl *)(void *))thdA,0,(void *)1);
_beginthread((void(__cdecl *)(void *))thdB,0,(void *)2);
#else
threadsN=0;
rc=pthread_create(&(threads[threadsN++]),NULL,thdA,(void *)1);if (rc) Log("%d=pthread_create %d error!\n",rc,threadsN-1);
rc=pthread_create(&(threads[threadsN++]),NULL,thdB,(void *)2);if (rc) Log("%d=pthread_create %d error!\n",rc,threadsN-1);
#endif
if (!access("No_Loop",0)) {
remove("No_Loop");
if (!access("No_Loop",0)) {
No_Loop=1;
}
}
while (1) {
sleep_ms(1000);
if (No_Loop) break;//
if (!access("No_Loop",0)) {
No_Loop=1;
}
}
sleep_ms(3000);
Log("End=============================================================\n");
#ifdef WIN32
DeleteCriticalSection(&cs_BBB );
DeleteCriticalSection(&cs_HEX );
DeleteCriticalSection(&cs_log);
#else
pthread_mutex_destroy(&cs_BBB);
pthread_mutex_destroy(&cs_HEX);
pthread_mutex_destroy(&cs_log);
#endif
return 0;
}
#2
*drcdata++ = 0.33*red + 0.33*gre +0.33*blu;
是这条语句的问题,在线程中,这条语句的值变为了负值; 在主函数中,这条语句的值是正的.
这是什么原因呢?
是这条语句的问题,在线程中,这条语句的值变为了负值; 在主函数中,这条语句的值是正的.
这是什么原因呢?
#3
不知道你两个地方,调用的时候,参数是怎么传的,没办法给你分析,你可以自己调试下,一看就明白。
还有这里多半是用不到锁,因为都是线程私有数据。
#4
不清楚你为什么一上来就说要用锁,LZ给的那个函数内部,全是栈变量,线程私有数据。根本不需要用到锁的知识。
#5
串口信息输出难道不是临界资源?
#6
__s32 photo_argb_8bpp(__u8 *srcdata,__u8 * drcdata,__s32 len)
{
// unsigned char __u8
__u8 *date;
__u32 tmp;
__u32 cnt;
__u8 red;
__u8 gre;
__u8 blu;
__u8 alpha;
tmp = 0;
red = 0;
gre = 0;
blu = 0;
alpha = 0;
date = srcdata;
eLIBs_printf("..%s..%d..........+.-....len=%d...\n\n", __FILE__, __LINE__, len);
GUI_LOCK();
for (cnt = 0; cnt < len; cnt++)
{
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d..\n\n", __FILE__, __LINE__, cnt, red, gre, blu, alpha);
}
red = *(date + tmp + 0);
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d..\n\n", __FILE__, __LINE__, cnt, red, gre, blu, alpha);
}
gre = *(date + tmp + 1);
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d..\n\n", __FILE__, __LINE__, cnt, red, gre, blu, alpha);
}
blu = *(date + tmp + 2);
线程中,这里就出现负数了,不知是何原因。主函数和线程中调用时的参数是一样的.
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d....*drcdata=%d...\n\n",
__FILE__, __LINE__, cnt, red, gre, blu, alpha, 0.33*red + 0.33*gre +0.33*blu);
}
*drcdata++ = 0.33*red + 0.33*gre +0.33*blu;
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d...drcdata=%d.\n\n",
__FILE__, __LINE__, cnt, red, gre, blu, alpha,*drcdata);
}
tmp+= 4;
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d..\n\n", __FILE__, __LINE__, cnt, red, gre, blu, alpha);
}
}
GUI_UNLOCK();
return 0;
}
{
// unsigned char __u8
__u8 *date;
__u32 tmp;
__u32 cnt;
__u8 red;
__u8 gre;
__u8 blu;
__u8 alpha;
tmp = 0;
red = 0;
gre = 0;
blu = 0;
alpha = 0;
date = srcdata;
eLIBs_printf("..%s..%d..........+.-....len=%d...\n\n", __FILE__, __LINE__, len);
GUI_LOCK();
for (cnt = 0; cnt < len; cnt++)
{
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d..\n\n", __FILE__, __LINE__, cnt, red, gre, blu, alpha);
}
red = *(date + tmp + 0);
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d..\n\n", __FILE__, __LINE__, cnt, red, gre, blu, alpha);
}
gre = *(date + tmp + 1);
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d..\n\n", __FILE__, __LINE__, cnt, red, gre, blu, alpha);
}
blu = *(date + tmp + 2);
线程中,这里就出现负数了,不知是何原因。主函数和线程中调用时的参数是一样的.
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d....*drcdata=%d...\n\n",
__FILE__, __LINE__, cnt, red, gre, blu, alpha, 0.33*red + 0.33*gre +0.33*blu);
}
*drcdata++ = 0.33*red + 0.33*gre +0.33*blu;
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d...drcdata=%d.\n\n",
__FILE__, __LINE__, cnt, red, gre, blu, alpha,*drcdata);
}
tmp+= 4;
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d..\n\n", __FILE__, __LINE__, cnt, red, gre, blu, alpha);
}
}
GUI_UNLOCK();
return 0;
}
#1
加临界区锁
参考下面
参考下面
//循环向a函数每次发送200个字节长度(这个是固定的)的buffer,
//a函数中需要将循环传进来的buffer,组成240字节(也是固定的)的新buffer进行处理,
//在处理的时候每次从新buffer中取两个字节打印
#ifdef WIN32
#pragma warning(disable:4996)
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef WIN32
#include <windows.h>
#include <process.h>
#include <io.h>
#define MYVOID void
#define vsnprintf _vsnprintf
#else
#include <unistd.h>
#include <sys/time.h>
#include <pthread.h>
#define CRITICAL_SECTION pthread_mutex_t
#define MYVOID void *
#endif
//Log{
#define MAXLOGSIZE 20000000
#define MAXLINSIZE 16000
#include <time.h>
#include <sys/timeb.h>
#include <stdarg.h>
char logfilename1[]="MyLog1.log";
char logfilename2[]="MyLog2.log";
static char logstr[MAXLINSIZE+1];
char datestr[16];
char timestr[16];
char mss[4];
CRITICAL_SECTION cs_log;
FILE *flog;
#ifdef WIN32
void Lock(CRITICAL_SECTION *l) {
EnterCriticalSection(l);
}
void Unlock(CRITICAL_SECTION *l) {
LeaveCriticalSection(l);
}
void sleep_ms(int ms) {
Sleep(ms);
}
#else
void Lock(CRITICAL_SECTION *l) {
pthread_mutex_lock(l);
}
void Unlock(CRITICAL_SECTION *l) {
pthread_mutex_unlock(l);
}
void sleep_ms(int ms) {
usleep(ms*1000);
}
#endif
void LogV(const char *pszFmt,va_list argp) {
struct tm *now;
struct timeb tb;
if (NULL==pszFmt||0==pszFmt[0]) return;
vsnprintf(logstr,MAXLINSIZE,pszFmt,argp);
ftime(&tb);
now=localtime(&tb.time);
sprintf(datestr,"%04d-%02d-%02d",now->tm_year+1900,now->tm_mon+1,now->tm_mday);
sprintf(timestr,"%02d:%02d:%02d",now->tm_hour ,now->tm_min ,now->tm_sec );
sprintf(mss,"%03d",tb.millitm);
printf("%s %s.%s %s",datestr,timestr,mss,logstr);
flog=fopen(logfilename1,"a");
if (NULL!=flog) {
fprintf(flog,"%s %s.%s %s",datestr,timestr,mss,logstr);
if (ftell(flog)>MAXLOGSIZE) {
fclose(flog);
if (rename(logfilename1,logfilename2)) {
remove(logfilename2);
rename(logfilename1,logfilename2);
}
} else {
fclose(flog);
}
}
}
void Log(const char *pszFmt,...) {
va_list argp;
Lock(&cs_log);
va_start(argp,pszFmt);
LogV(pszFmt,argp);
va_end(argp);
Unlock(&cs_log);
}
//Log}
#define ASIZE 200
#define BSIZE 240
#define CSIZE 2
char Abuf[ASIZE];
char Cbuf[CSIZE];
CRITICAL_SECTION cs_HEX ;
CRITICAL_SECTION cs_BBB ;
struct FIFO_BUFFER {
int head;
int tail;
int size;
char data[BSIZE];
} BBB;
int No_Loop=0;
void HexDump(int cn,char *buf,int len) {
int i,j,k;
char binstr[80];
Lock(&cs_HEX);
for (i=0;i<len;i++) {
if (0==(i%16)) {
sprintf(binstr,"%03d %04x -",cn,i);
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
} else if (15==(i%16)) {
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
sprintf(binstr,"%s ",binstr);
for (j=i-15;j<=i;j++) {
sprintf(binstr,"%s%c",binstr,('!'<buf[j]&&buf[j]<='~')?buf[j]:'.');
}
Log("%s\n",binstr);
} else {
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
}
}
if (0!=(i%16)) {
k=16-(i%16);
for (j=0;j<k;j++) {
sprintf(binstr,"%s ",binstr);
}
sprintf(binstr,"%s ",binstr);
k=16-k;
for (j=i-k;j<i;j++) {
sprintf(binstr,"%s%c",binstr,('!'<buf[j]&&buf[j]<='~')?buf[j]:'.');
}
Log("%s\n",binstr);
}
Unlock(&cs_HEX);
}
int GetFromRBuf(int cn,CRITICAL_SECTION *cs,FIFO_BUFFER *fbuf,char *buf,int len) {
int lent,len1,len2;
lent=0;
Lock(cs);
if (fbuf->size>=len) {
lent=len;
if (fbuf->head+lent>BSIZE) {
len1=BSIZE-fbuf->head;
memcpy(buf ,fbuf->data+fbuf->head,len1);
len2=lent-len1;
memcpy(buf+len1,fbuf->data ,len2);
fbuf->head=len2;
} else {
memcpy(buf ,fbuf->data+fbuf->head,lent);
fbuf->head+=lent;
}
fbuf->size-=lent;
}
Unlock(cs);
return lent;
}
MYVOID thdB(void *pcn) {
char *recv_buf;
int recv_nbytes;
int cn;
int wc;
int pb;
cn=(int)pcn;
Log("%03d thdB thread begin...\n",cn);
while (1) {
sleep_ms(10);
recv_buf=(char *)Cbuf;
recv_nbytes=CSIZE;
wc=0;
while (1) {
pb=GetFromRBuf(cn,&cs_BBB,&BBB,recv_buf,recv_nbytes);
if (pb) {
Log("%03d recv %d bytes\n",cn,pb);
HexDump(cn,recv_buf,pb);
sleep_ms(1);
} else {
sleep_ms(1000);
}
if (No_Loop) break;//
wc++;
if (wc>3600) Log("%03d %d==wc>3600!\n",cn,wc);
}
if (No_Loop) break;//
}
#ifndef WIN32
pthread_exit(NULL);
#endif
}
int PutToRBuf(int cn,CRITICAL_SECTION *cs,FIFO_BUFFER *fbuf,char *buf,int len) {
int lent,len1,len2;
Lock(cs);
lent=len;
if (fbuf->size+lent>BSIZE) {
lent=BSIZE-fbuf->size;
}
if (fbuf->tail+lent>BSIZE) {
len1=BSIZE-fbuf->tail;
memcpy(fbuf->data+fbuf->tail,buf ,len1);
len2=lent-len1;
memcpy(fbuf->data ,buf+len1,len2);
fbuf->tail=len2;
} else {
memcpy(fbuf->data+fbuf->tail,buf ,lent);
fbuf->tail+=lent;
}
fbuf->size+=lent;
Unlock(cs);
return lent;
}
MYVOID thdA(void *pcn) {
char *send_buf;
int send_nbytes;
int cn;
int wc;
int a;
int pa;
cn=(int)pcn;
Log("%03d thdA thread begin...\n",cn);
a=0;
while (1) {
sleep_ms(100);
memset(Abuf,a,ASIZE);
a=(a+1)%256;
if (16==a) {No_Loop=1;break;}//去掉这句可以让程序一直循环直到按Ctrl+C或Ctrl+Break或当前目录下存在文件No_Loop
send_buf=(char *)Abuf;
send_nbytes=ASIZE;
Log("%03d sending %d bytes\n",cn,send_nbytes);
HexDump(cn,send_buf,send_nbytes);
wc=0;
while (1) {
pa=PutToRBuf(cn,&cs_BBB,&BBB,send_buf,send_nbytes);
Log("%03d sent %d bytes\n",cn,pa);
HexDump(cn,send_buf,pa);
send_buf+=pa;
send_nbytes-=pa;
if (send_nbytes<=0) break;//
sleep_ms(1000);
if (No_Loop) break;//
wc++;
if (wc>3600) Log("%03d %d==wc>3600!\n",cn,wc);
}
if (No_Loop) break;//
}
#ifndef WIN32
pthread_exit(NULL);
#endif
}
int main() {
#ifdef WIN32
InitializeCriticalSection(&cs_log);
InitializeCriticalSection(&cs_HEX );
InitializeCriticalSection(&cs_BBB );
#else
pthread_t threads[2];
int threadsN;
int rc;
pthread_mutex_init(&cs_log,NULL);
pthread_mutex_init(&cs_HEX,NULL);
pthread_mutex_init(&cs_BBB,NULL);
#endif
Log("Start===========================================================\n");
BBB.head=0;
BBB.tail=0;
BBB.size=0;
#ifdef WIN32
_beginthread((void(__cdecl *)(void *))thdA,0,(void *)1);
_beginthread((void(__cdecl *)(void *))thdB,0,(void *)2);
#else
threadsN=0;
rc=pthread_create(&(threads[threadsN++]),NULL,thdA,(void *)1);if (rc) Log("%d=pthread_create %d error!\n",rc,threadsN-1);
rc=pthread_create(&(threads[threadsN++]),NULL,thdB,(void *)2);if (rc) Log("%d=pthread_create %d error!\n",rc,threadsN-1);
#endif
if (!access("No_Loop",0)) {
remove("No_Loop");
if (!access("No_Loop",0)) {
No_Loop=1;
}
}
while (1) {
sleep_ms(1000);
if (No_Loop) break;//
if (!access("No_Loop",0)) {
No_Loop=1;
}
}
sleep_ms(3000);
Log("End=============================================================\n");
#ifdef WIN32
DeleteCriticalSection(&cs_BBB );
DeleteCriticalSection(&cs_HEX );
DeleteCriticalSection(&cs_log);
#else
pthread_mutex_destroy(&cs_BBB);
pthread_mutex_destroy(&cs_HEX);
pthread_mutex_destroy(&cs_log);
#endif
return 0;
}
#2
*drcdata++ = 0.33*red + 0.33*gre +0.33*blu;
是这条语句的问题,在线程中,这条语句的值变为了负值; 在主函数中,这条语句的值是正的.
这是什么原因呢?
是这条语句的问题,在线程中,这条语句的值变为了负值; 在主函数中,这条语句的值是正的.
这是什么原因呢?
#3
不知道你两个地方,调用的时候,参数是怎么传的,没办法给你分析,你可以自己调试下,一看就明白。
还有这里多半是用不到锁,因为都是线程私有数据。
#4
不清楚你为什么一上来就说要用锁,LZ给的那个函数内部,全是栈变量,线程私有数据。根本不需要用到锁的知识。
#5
串口信息输出难道不是临界资源?
#6
__s32 photo_argb_8bpp(__u8 *srcdata,__u8 * drcdata,__s32 len)
{
// unsigned char __u8
__u8 *date;
__u32 tmp;
__u32 cnt;
__u8 red;
__u8 gre;
__u8 blu;
__u8 alpha;
tmp = 0;
red = 0;
gre = 0;
blu = 0;
alpha = 0;
date = srcdata;
eLIBs_printf("..%s..%d..........+.-....len=%d...\n\n", __FILE__, __LINE__, len);
GUI_LOCK();
for (cnt = 0; cnt < len; cnt++)
{
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d..\n\n", __FILE__, __LINE__, cnt, red, gre, blu, alpha);
}
red = *(date + tmp + 0);
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d..\n\n", __FILE__, __LINE__, cnt, red, gre, blu, alpha);
}
gre = *(date + tmp + 1);
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d..\n\n", __FILE__, __LINE__, cnt, red, gre, blu, alpha);
}
blu = *(date + tmp + 2);
线程中,这里就出现负数了,不知是何原因。主函数和线程中调用时的参数是一样的.
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d....*drcdata=%d...\n\n",
__FILE__, __LINE__, cnt, red, gre, blu, alpha, 0.33*red + 0.33*gre +0.33*blu);
}
*drcdata++ = 0.33*red + 0.33*gre +0.33*blu;
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d...drcdata=%d.\n\n",
__FILE__, __LINE__, cnt, red, gre, blu, alpha,*drcdata);
}
tmp+= 4;
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d..\n\n", __FILE__, __LINE__, cnt, red, gre, blu, alpha);
}
}
GUI_UNLOCK();
return 0;
}
{
// unsigned char __u8
__u8 *date;
__u32 tmp;
__u32 cnt;
__u8 red;
__u8 gre;
__u8 blu;
__u8 alpha;
tmp = 0;
red = 0;
gre = 0;
blu = 0;
alpha = 0;
date = srcdata;
eLIBs_printf("..%s..%d..........+.-....len=%d...\n\n", __FILE__, __LINE__, len);
GUI_LOCK();
for (cnt = 0; cnt < len; cnt++)
{
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d..\n\n", __FILE__, __LINE__, cnt, red, gre, blu, alpha);
}
red = *(date + tmp + 0);
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d..\n\n", __FILE__, __LINE__, cnt, red, gre, blu, alpha);
}
gre = *(date + tmp + 1);
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d..\n\n", __FILE__, __LINE__, cnt, red, gre, blu, alpha);
}
blu = *(date + tmp + 2);
线程中,这里就出现负数了,不知是何原因。主函数和线程中调用时的参数是一样的.
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d....*drcdata=%d...\n\n",
__FILE__, __LINE__, cnt, red, gre, blu, alpha, 0.33*red + 0.33*gre +0.33*blu);
}
*drcdata++ = 0.33*red + 0.33*gre +0.33*blu;
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d...drcdata=%d.\n\n",
__FILE__, __LINE__, cnt, red, gre, blu, alpha,*drcdata);
}
tmp+= 4;
if (cnt<10)
{
eLIBs_printf("..%s..%d......cnt=%d;.%d..%d..%d..%d..\n\n", __FILE__, __LINE__, cnt, red, gre, blu, alpha);
}
}
GUI_UNLOCK();
return 0;
}