为什么5个工作线程的执行顺序保持不边?达人请进.

czb 2007-08-07 05:03:43
程序首先创建了一个投递线程，5个工作线程(线程0、线程1、线程2、线程3、线程4)。投递线程用于产生数据，并把产生的数据放到一个队列中。5个工作线程从这个数据队列中提取数据，并把提取后的数据给删掉，并随机延迟一段时间。
每个工作线程延迟一个随机的时间后，继续从数据队列中提取数据。
这5个工作线程是处于竞争状态的,如线程0、线程1、线程3、线程4处于运行状态，线程2处于空闲状态，则下一次系统调度，就调用线程2。

现在我的问题是，程序中这5个工作线程，是按顺序处理队列数据的。即先是线程1处理数据，再是线程2，3，4，0；一个循环之后，还是1、2、3、4、0；再循环之后，接着还是1、2、3、4、0...
这5个工作线程根本就没有抢时间去跑。

付关键代码如下
#define workThreadCount 5;
volatile bool isMainThreadWorking;
std::queue<int> lst_data;

std::queue<int> lst_p_thread_data[5];

int count;
CCriticalSection critical_section;
CEvent eventBeginWork;

UINT postThread(LPVOID pParam);
UINT workThread(LPVOID pParam);

UINT postThread(LPVOID pParam)
{
time_t t;
srand((unsigned) time(&t));

while(isMainThreadWorking&&count<10000){
critical_section.Lock();

lst_data.push(count);
count++;

critical_section.Unlock();
if(count%10==0)
{
eventBeginWork.SetEvent();
}

Sleep(rand()%800);
}
return 0;
}

UINT workThread(LPVOID pParam)
{
int ThreadNo;
std::queue<int> lst_work_thread_data;
time_t t;
srand((unsigned) time(&t));

ThreadNo = *((int*)pParam);

//CString sPrintMessage;
//sPrintMessage.Format(_T("线程%d开始"),ThreadNo);
//AfxMessageBox(sPrintMessage);

while(isMainThreadWorking){

WaitForSingleObject(eventBeginWork,INFINITE);

critical_section.Lock();

CString threadNo;
threadNo.Format(_T("线程%d正在运行"),ThreadNo);
//((CDataWriterDlg*)AfxGetApp()->m_pMainWnd)->m_display_static.SetWindowTextW(threadNo);

while(!lst_data.empty())
{
lst_work_thread_data.push(lst_data.front());
lst_data.pop();
}

critical_section.Unlock();

Sleep(rand()%1200);
}

while(!lst_work_thread_data.empty())
{
lst_p_thread_data[ThreadNo].push(lst_work_thread_data.front());
lst_work_thread_data.pop();
}

return 0;
}

void CDataWriterDlg::OnBnClickedStart()
{
// TODO: 在此添加控件通知处理程序代码
isMainThreadWorking = true;
pPostThread = AfxBeginThread((AFX_THREADPROC)postThread,NULL);

for(int i=0;i<5;i++)
{
pWorkThread[i] = AfxBeginThread((AFX_THREADPROC)workThread,(LPVOID)&i);
}
}

void CDataWriterDlg::OnBnClickedStop()
{
// TODO: 在此添加控件通知处理程序代码
isMainThreadWorking = false;
WaitForSingleObject(pPostThread->m_hThread,INFINITE);

eventBeginWork.SetEvent();
eventBeginWork.SetEvent();
eventBeginWork.SetEvent();
eventBeginWork.SetEvent();
eventBeginWork.SetEvent();

WaitForSingleObject(pWorkThread[0]->m_hThread,INFINITE);
WaitForSingleObject(pWorkThread[1]->m_hThread,INFINITE);
WaitForSingleObject(pWorkThread[2]->m_hThread,INFINITE);
WaitForSingleObject(pWorkThread[3]->m_hThread,INFINITE);
WaitForSingleObject(pWorkThread[4]->m_hThread,INFINITE);

}

void CDataWriterDlg::OnBnClickedSave()
{
// TODO: 在此添加控件通知处理程序代码
CStdioFile mFile;
CFileException mExcept;
mFile.Open(_T("Result.txt"), CFile::modeCreate|CFile::modeWrite, &mExcept);
CString string;
string.Format(_T("count=%d\r\n"),count);
//string.Append(_T(","));

for(int i=0;i<5;i++)
{
CString threadNO;
threadNO.Format(_T("Thread No:%d\r\n"),i);
string.Append(threadNO);
while(!lst_p_thread_data[i].empty())
{
CString values;
values.Format(_T("%d,"),lst_p_thread_data[i].front());
lst_p_thread_data[i].pop();
string.Append(values);
}
string.Append(_T("\r\n"));
}

mFile.WriteString(string);
mFile.Close();
}

class CDataWriterDlg : public CDialog
{
// 构造
public:
CDataWriterDlg(CWnd* pParent = NULL); // 标准构造函数

// 对话框数据
enum { IDD = IDD_DATAWRITER_DIALOG };

protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV 支持

public:
CWinThread* pPostThread;
CWinThread* pWorkThread[5];

// 实现
protected:
HICON m_hIcon;

// 生成的消息映射函数
virtual BOOL OnInitDialog();
afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
afx_msg void OnPaint();
afx_msg HCURSOR OnQueryDragIcon();
DECLARE_MESSAGE_MAP()
public:
afx_msg void OnDestroy();
public:
afx_msg void OnBnClickedStart();
public:
afx_msg void OnBnClickedStop();
public:
afx_msg void OnBnClickedSave();
public:
CStatic m_display_static;
};
...全文
296 15 打赏 收藏 转发到动态 举报
写回复
用AI写文章
15 条回复
切换为时间正序
请发表友善的回复…
发表回复
czb 2007-08-15
  • 打赏
  • 举报
 回复
感谢各位朋友的大力帮助
结贴了
jasonshark 2007-08-11
  • 打赏
  • 举报
 回复
你的event是不是自动reset的？这样的话你每次SetEvent实际上只有一个线程能进入Ready状态. 至于每次SetEvent的时候究竟是哪个线程进入Ready态，这个应该是操作系统的implementation detail了, 而且具体的调度策略可能在每个版本的操作系统中可能还有变化，毕竟是undocumented的东西. 我只能分析的到这么多了，呵呵～

PS:我刚开始认为是线程亲缘性的原因，但想了想觉得不对，亲缘性是指单个线程调度到多个CPU上的选择策略
czb 2007-08-11
  • 打赏
  • 举报
 回复
如jasonshark(没暑假了...) 所说,把时间的延迟调到两个极端,操作系统确实是会不按照顺序来调度线程了,不过这不是我所需要的.
我需要的是,postThread里根本就不需要时间延迟,然后在每count增加到10的整数倍的时候,设置一下信号,见postThrea中下面的代码
if(count%10==0)
{
eventBeginWork.SetEvent();
}
但这时奇怪的时候,只有5个中的一个workThread执行了,而且这个workThread处理完了所有的数据,其它的4个workThread根本没有执行.难道其它的SetEvent没有反应过来?
czb 2007-08-08
  • 打赏
  • 举报
 回复
jasonshark(没暑假了...) :
可以这么说了.
我按照你说的测试一下.
jasonshark 2007-08-08
  • 打赏
  • 举报
 回复
我大概明白你的意思...
你是说尽管每个线程Sleep的时间长短不一样. 但最终操作系统调度执行结果，却看不出Sleep时间不同, 是不是这样？

你可以尝试把其实一两个线程Sleep的时间特别长，达到3，4秒，而其他的在1秒之内，再看看结果呢
czb 2007-08-08
  • 打赏
  • 举报
 回复
大家观察"running thread no:"下面的行,这些行显示了哪个线程正在取队列中的数据,由上面的数据可知,正在取队列中数据的线程总是按照线程"1,2,3,4,0"的顺序来进行,即这5个工作线程根本就没有抢时间去跑.

这么说，大家应该都明白了吧?
czb 2007-08-08
  • 打赏
  • 举报
 回复
点击start按钮(OnBnClickedStart),运行一段时间后再点击stop按钮(OnBnClickedStop),然后点保存save按钮(OnBnClickedSave),结果如下
count=1595

Thread No:0

40,41,42,43,44,45,46,47,48,49,90,91,92,93,94,95,96,97,98,99,140,141,142,143,144,145,146,147,148,149,190,191,192,193,194,195,196,197,198,199,240,241,242,243,244,245,246,247,248,249,290,291,292,293,294,295,296,297,298,299,340,341,342,343,344,345,346,347,348,349,390,391,392,393,394,395,396,397,398,399,440,441,442,443,444,445,446,447,448,449,490,491,492,493,494,495,496,497,498,499,540,541,542,543,544,545,546,547,548,549,590,591,592,593,594,595,596,597,598,599,640,641,642,643,644,645,646,647,648,649,690,691,692,693,694,695,696,697,698,699,740,741,742,743,744,745,746,747,748,749,790,791,792,793,794,795,796,797,798,799,840,841,842,843,844,845,846,847,848,849,890,891,892,893,894,895,896,897,898,899,940,941,942,943,944,945,946,947,948,949,990,991,992,993,994,995,996,997,998,999,1040,1041,1042,1043,1044,1045,1046,1047,1048,1049,1090,1091,1092,1093,1094,1095,1096,1097,1098,1099,1140,1141,1142,1143,1144,1145,1146,1147,1148,1149,1190,1191,1192,1193,1194,1195,1196,1197,1198,1199,1240,1241,1242,1243,1244,1245,1246,1247,1248,1249,1290,1291,1292,1293,1294,1295,1296,1297,1298,1299,1340,1341,1342,1343,1344,1345,1346,1347,1348,1349,1390,1391,1392,1393,1394,1395,1396,1397,1398,1399,1440,1441,1442,1443,1444,1445,1446,1447,1448,1449,1490,1491,1492,1493,1494,1495,1496,1497,1498,1499,1540,1541,1542,1543,1544,1545,1546,1547,1548,1549,1590,1591,1592,1593,1594,

Thread No:1

0,1,2,3,4,5,6,7,8,9,50,51,52,53,54,55,56,57,58,59,100,101,102,103,104,105,106,107,108,109,150,151,152,153,154,155,156,157,158,159,200,201,202,203,204,205,206,207,208,209,250,251,252,253,254,255,256,257,258,259,300,301,302,303,304,305,306,307,308,309,350,351,352,353,354,355,356,357,358,359,400,401,402,403,404,405,406,407,408,409,450,451,452,453,454,455,456,457,458,459,500,501,502,503,504,505,506,507,508,509,550,551,552,553,554,555,556,557,558,559,600,601,602,603,604,605,606,607,608,609,650,651,652,653,654,655,656,657,658,659,700,701,702,703,704,705,706,707,708,709,750,751,752,753,754,755,756,757,758,759,800,801,802,803,804,805,806,807,808,809,850,851,852,853,854,855,856,857,858,859,900,901,902,903,904,905,906,907,908,909,950,951,952,953,954,955,956,957,958,959,1000,1001,1002,1003,1004,1005,1006,1007,1008,1009,1050,1051,1052,1053,1054,1055,1056,1057,1058,1059,1100,1101,1102,1103,1104,1105,1106,1107,1108,1109,1150,1151,1152,1153,1154,1155,1156,1157,1158,1159,1200,1201,1202,1203,1204,1205,1206,1207,1208,1209,1250,1251,1252,1253,1254,1255,1256,1257,1258,1259,1300,1301,1302,1303,1304,1305,1306,1307,1308,1309,1350,1351,1352,1353,1354,1355,1356,1357,1358,1359,1400,1401,1402,1403,1404,1405,1406,1407,1408,1409,1450,1451,1452,1453,1454,1455,1456,1457,1458,1459,1500,1501,1502,1503,1504,1505,1506,1507,1508,1509,1550,1551,1552,1553,1554,1555,1556,1557,1558,1559,

Thread No:2

10,11,12,13,14,15,16,17,18,19,60,61,62,63,64,65,66,67,68,69,110,111,112,113,114,115,116,117,118,119,160,161,162,163,164,165,166,167,168,169,210,211,212,213,214,215,216,217,218,219,260,261,262,263,264,265,266,267,268,269,310,311,312,313,314,315,316,317,318,319,360,361,362,363,364,365,366,367,368,369,410,411,412,413,414,415,416,417,418,419,460,461,462,463,464,465,466,467,468,469,510,511,512,513,514,515,516,517,518,519,560,561,562,563,564,565,566,567,568,569,610,611,612,613,614,615,616,617,618,619,660,661,662,663,664,665,666,667,668,669,710,711,712,713,714,715,716,717,718,719,760,761,762,763,764,765,766,767,768,769,810,811,812,813,814,815,816,817,818,819,860,861,862,863,864,865,866,867,868,869,910,911,912,913,914,915,916,917,918,919,960,961,962,963,964,965,966,967,968,969,1010,1011,1012,1013,1014,1015,1016,1017,1018,1019,1060,1061,1062,1063,1064,1065,1066,1067,1068,1069,1110,1111,1112,1113,1114,1115,1116,1117,1118,1119,1160,1161,1162,1163,1164,1165,1166,1167,1168,1169,1210,1211,1212,1213,1214,1215,1216,1217,1218,1219,1260,1261,1262,1263,1264,1265,1266,1267,1268,1269,1310,1311,1312,1313,1314,1315,1316,1317,1318,1319,1360,1361,1362,1363,1364,1365,1366,1367,1368,1369,1410,1411,1412,1413,1414,1415,1416,1417,1418,1419,1460,1461,1462,1463,1464,1465,1466,1467,1468,1469,1510,1511,1512,1513,1514,1515,1516,1517,1518,1519,1560,1561,1562,1563,1564,1565,1566,1567,1568,1569,

Thread No:3

20,21,22,23,24,25,26,27,28,29,70,71,72,73,74,75,76,77,78,79,120,121,122,123,124,125,126,127,128,129,170,171,172,173,174,175,176,177,178,179,220,221,222,223,224,225,226,227,228,229,270,271,272,273,274,275,276,277,278,279,320,321,322,323,324,325,326,327,328,329,370,371,372,373,374,375,376,377,378,379,420,421,422,423,424,425,426,427,428,429,470,471,472,473,474,475,476,477,478,479,520,521,522,523,524,525,526,527,528,529,570,571,572,573,574,575,576,577,578,579,620,621,622,623,624,625,626,627,628,629,670,671,672,673,674,675,676,677,678,679,720,721,722,723,724,725,726,727,728,729,770,771,772,773,774,775,776,777,778,779,820,821,822,823,824,825,826,827,828,829,870,871,872,873,874,875,876,877,878,879,920,921,922,923,924,925,926,927,928,929,970,971,972,973,974,975,976,977,978,979,1020,1021,1022,1023,1024,1025,1026,1027,1028,1029,1070,1071,1072,1073,1074,1075,1076,1077,1078,1079,1120,1121,1122,1123,1124,1125,1126,1127,1128,1129,1170,1171,1172,1173,1174,1175,1176,1177,1178,1179,1220,1221,1222,1223,1224,1225,1226,1227,1228,1229,1270,1271,1272,1273,1274,1275,1276,1277,1278,1279,1320,1321,1322,1323,1324,1325,1326,1327,1328,1329,1370,1371,1372,1373,1374,1375,1376,1377,1378,1379,1420,1421,1422,1423,1424,1425,1426,1427,1428,1429,1470,1471,1472,1473,1474,1475,1476,1477,1478,1479,1520,1521,1522,1523,1524,1525,1526,1527,1528,1529,1570,1571,1572,1573,1574,1575,1576,1577,1578,1579,

Thread No:4

30,31,32,33,34,35,36,37,38,39,80,81,82,83,84,85,86,87,88,89,130,131,132,133,134,135,136,137,138,139,180,181,182,183,184,185,186,187,188,189,230,231,232,233,234,235,236,237,238,239,280,281,282,283,284,285,286,287,288,289,330,331,332,333,334,335,336,337,338,339,380,381,382,383,384,385,386,387,388,389,430,431,432,433,434,435,436,437,438,439,480,481,482,483,484,485,486,487,488,489,530,531,532,533,534,535,536,537,538,539,580,581,582,583,584,585,586,587,588,589,630,631,632,633,634,635,636,637,638,639,680,681,682,683,684,685,686,687,688,689,730,731,732,733,734,735,736,737,738,739,780,781,782,783,784,785,786,787,788,789,830,831,832,833,834,835,836,837,838,839,880,881,882,883,884,885,886,887,888,889,930,931,932,933,934,935,936,937,938,939,980,981,982,983,984,985,986,987,988,989,1030,1031,1032,1033,1034,1035,1036,1037,1038,1039,1080,1081,1082,1083,1084,1085,1086,1087,1088,1089,1130,1131,1132,1133,1134,1135,1136,1137,1138,1139,1180,1181,1182,1183,1184,1185,1186,1187,1188,1189,1230,1231,1232,1233,1234,1235,1236,1237,1238,1239,1280,1281,1282,1283,1284,1285,1286,1287,1288,1289,1330,1331,1332,1333,1334,1335,1336,1337,1338,1339,1380,1381,1382,1383,1384,1385,1386,1387,1388,1389,1430,1431,1432,1433,1434,1435,1436,1437,1438,1439,1480,1481,1482,1483,1484,1485,1486,1487,1488,1489,1530,1531,1532,1533,1534,1535,1536,1537,1538,1539,1580,1581,1582,1583,1584,1585,1586,1587,1588,1589,



running thread no:

1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,0,1,2,3,4,
czb 2007-08-08
  • 打赏
  • 举报
 回复
不好意思,我上面的说明说得不太明白,这里重新再说明一下,并且根据jasonshark(没暑假了...) 和fronz()的建议,每个线程根据线程号采用固定时间的延迟,并把正在运行的线程号也记录下来.修改后的DataWriterDlg.cpp程序如下

#include "stdafx.h"

#include <list>
#include <string>
#include <queue>
#include <afxmt.h>
#include <time.h>


#include "DataWriter.h"
#include "DataWriterDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

#define workThreadCount 5;
volatile bool isMainThreadWorking;
std::queue<int> lst_data;
std::queue<int> running_thread_no;
std::queue<int> lst_p_thread_data[5];

int count;
CCriticalSection critical_section;
CEvent eventBeginWork;

UINT postThread(LPVOID pParam);
UINT workThread(LPVOID pParam);

UINT postThread(LPVOID pParam)
{
time_t t;
srand((unsigned) time(&t));

while(isMainThreadWorking&&count<10000){
critical_section.Lock();

lst_data.push(count);
count++;

critical_section.Unlock();
if(count%10==0)
{
eventBeginWork.SetEvent();
}

//Sleep(rand()%800);
Sleep(rand()%300);
}
return 0;
}

UINT workThread(LPVOID pParam)
{
int ThreadNo;
std::queue<int> lst_work_thread_data;
time_t t;
srand((unsigned) time(&t));

ThreadNo = *((int*)pParam);

//CString sPrintMessage;
//sPrintMessage.Format(_T("线程%d开始"),ThreadNo);
//AfxMessageBox(sPrintMessage);

while(isMainThreadWorking){

WaitForSingleObject(eventBeginWork,INFINITE);

critical_section.Lock();

//CString threadNo;
//threadNo.Format(_T("线程%d正在运行"),ThreadNo);
//((CDataWriterDlg*)AfxGetApp()->m_pMainWnd)->m_display_static.SetWindowTextW(threadNo);
running_thread_no.push(ThreadNo);

while(!lst_data.empty())
{
lst_work_thread_data.push(lst_data.front());
lst_data.pop();
}

critical_section.Unlock();

//Sleep(rand()%1200);
Sleep(200+ThreadNo*100);
}

while(!lst_work_thread_data.empty())
{
lst_p_thread_data[ThreadNo].push(lst_work_thread_data.front());
lst_work_thread_data.pop();
}

return 0;
}

void CDataWriterDlg::OnBnClickedStart()
{
// TODO: 在此添加控件通知处理程序代码
isMainThreadWorking = true;
pPostThread = AfxBeginThread((AFX_THREADPROC)postThread,NULL);

for(int i=0;i<5;i++)
{
pWorkThread[i] = AfxBeginThread((AFX_THREADPROC)workThread,(LPVOID)&i);
}
}

void CDataWriterDlg::OnBnClickedStop()
{
// TODO: 在此添加控件通知处理程序代码
isMainThreadWorking = false;
WaitForSingleObject(pPostThread->m_hThread,INFINITE);

eventBeginWork.SetEvent();
eventBeginWork.SetEvent();
eventBeginWork.SetEvent();
eventBeginWork.SetEvent();
eventBeginWork.SetEvent();

WaitForSingleObject(pWorkThread[0]->m_hThread,INFINITE);
WaitForSingleObject(pWorkThread[1]->m_hThread,INFINITE);
WaitForSingleObject(pWorkThread[2]->m_hThread,INFINITE);
WaitForSingleObject(pWorkThread[3]->m_hThread,INFINITE);
WaitForSingleObject(pWorkThread[4]->m_hThread,INFINITE);

}

void CDataWriterDlg::OnBnClickedSave()
{
// TODO: 在此添加控件通知处理程序代码
CStdioFile mFile;
CFileException mExcept;
mFile.Open(_T("Result.txt"), CFile::modeCreate|CFile::modeWrite, &mExcept);
CString string;
string.Format(_T("count=%d\r\n"),count);
//string.Append(_T(","));

for(int i=0;i<5;i++)
{
CString threadNO;
threadNO.Format(_T("Thread No:%d\r\n"),i);
string.Append(threadNO);
while(!lst_p_thread_data[i].empty())
{
CString values;
values.Format(_T("%d,"),lst_p_thread_data[i].front());
lst_p_thread_data[i].pop();
string.Append(values);
}
string.Append(_T("\r\n"));
}

string.Append(_T("\r\n"));
string.Append(_T("running thread no:\r\n"));
while(!running_thread_no.empty())
{
CString values;
values.Format(_T("%d,"),running_thread_no.front());
running_thread_no.pop();
string.Append(values);
}

mFile.WriteString(string);
mFile.Close();
}
fronz 2007-08-07
  • 打赏
  • 举报
 回复
啊，原来写在一起的，看错了。
fronz 2007-08-07
  • 打赏
  • 举报
 回复
MARK，
还不如直接设置固定时间延迟来看看到底结果如何。2000，2500，。。
应该有变化吧。
jasonshark 2007-08-07
  • 打赏
  • 举报
 回复
Shit... I misunderstood the time function...
I thought it was a constructor....

Sorry... :(
jasonshark 2007-08-07
  • 打赏
  • 举报
 回复
oops, I meant rand(0xCCCCCCCC) % 1200
jasonshark 2007-08-07
  • 打赏
  • 举报
 回复
I guess these two lines caused the problem:

time_t t;
srand((unsigned) time(&t));

this makes srand to set the same seed every time under DEBUG build(0xCCCCCCCC), so all your threads are actually Sleeping for the same amount of time: 0xCCCCCCCC % 1200
yjgx007 2007-08-07
  • 打赏
  • 举报
 回复
好复杂
DentistryDoctor 2007-08-07
  • 打赏
  • 举报
 回复
因为有同步，所以，总是只有一个线程能够抢到。。。
python线程进程、异步IO
多线程是指从软件或者硬件上实现多个线程并发执行的技术。具有多线程能力的计算机因有硬件支持而能够在同一时间 执行多于一个线程，进而提升整体处理性能。 该章节主要包括线程进程的概念，基于python的线程进程实现...
C#多线程操作界面控件的解决方案
在使用VS2005的时候，如果你从非创建这个控件的线程中访问这个控件或者操作这个控件的话就会抛出这个异常。这是微软为了保证线程安全以及提高代码的效率所做的改进，但是也给大家带来很多不便。其实解决这个问题有两...
C#中利用委托实现多线程跨线程操作
在使用VS2005的时候，如果你从非创建这个控件的线程中访问这个控件或者操作这个控件的话就会抛出这个异常。这是微软为了保证线程安全以及提高代码的效率所做的改进，但是也给大家带来很多不便。 其实解决这个问题有...
Adroid 收集
用两张图告诉你，为什么你的 App 会卡顿? - Android - 掘金 Cover 有什么料？ 从这篇文章中你能获得这些料： 知道setContentView()之后发生了什么？ ... Android 获取 View 宽高的常用正确方式，避免为零 - 掘金 ...
C/C++笔试题（很多）
微软亚洲技术中心的面试题！...(2)并发性：不仅进程之间可以并发执行，同一个进程的多个线程之间也可并发执行 (3)拥有资源：进程是拥有资源的独立单位，线程不拥有系统资源，但可以访问隶属于进程的资源.  (4
进程/线程/DLL

15,471

社区成员

49,182

社区内容

发帖
与我相关
我的任务
社区描述
VC/MFC 进程/线程/DLL
社区管理员
  • 进程/线程/DLL社区
加入社区
  • 近7日
  • 近30日
  • 至今

加载中

查看更多榜单
社区公告
暂无公告

试试用AI创作助手写篇文章吧

+ 用AI写文章