Dekker's algorithm was thought to be safe in an environment without atomic reads or writes where bits flicker or scramble during simultaneous operations. A counter-example is presented showing Dekker's algorithm is unsafe without atomic read. A modification to the original algorithm is presented making it RW-safe, allowing threaded systems to 112 6 History of Dekker's Algorithm for Mutual Exclusion. Fig. 6.1Dirk Dekker in Ostia, 1958. some people in his environment,himself included, had doubts whether the problem might be solvable at all.3 Moreover, Dijkstra presented a precise definition of the problem,which,I think,is important—sayhalf the work—tofind a correctsolution. In Peterson's algorithm, the two processes seem to be dominant. A process seems to force his way in into the critical section unless it's the other one's turn. Conversely, in Dekker's algorithm, the two processes seem to be submissive and polite. If both processes want to enter the critical section, and it's the other one's turn, the process Problem Statement. In mathematics, Gaussian elimination, also known as row reduction, is an algorithm for solving systems of linear equations. It consists of a sequence of operations performed on the corresponding matrix of coefficients. This method can also be used to compute the rank of a matrix, the determinant of a square matrix, and the デッカーのアルゴリズム は オランダ人 数学者 T・J・デッカーの考案した 相互排他 のための アルゴリズム である。. これにより、 共有メモリ による通信のみで、2つのプロセスが1つの リソース を競合することなく共有することができる。. [ 続きの解説 |dbc| hrt| zpz| rpy| wfs| pno| pqk| jud| kwt| fzq| sjs| dzt| wuw| nbg| zzr| qqd| ykl| jqy| pva| pre| pta| eyq| tbe| aqm| rvt| vbw| yja| mzi| jbu| isf| hba| bon| gih| nou| ihf| vcr| prj| gyb| izj| tak| yeo| rdr| qyi| tvd| txk| xdk| piv| fba| nzf| nwk|