作者查詢 / VictorTom
作者 VictorTom 在 PTT [ C_and_CPP ] 看板的留言(推文), 共10783則
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11F推:在文章列表按大寫 T 的樣子@_@"08/07 20:53
1F推:推推理過程:)08/04 00:24
26F推:並不是因為裝的VC是32/64bit版的所以寫出來的程式就是08/03 23:39
27F→:32/64bit, 而是取決於你build的時候target machine是選08/03 23:40
28F→:x86還是x64, 32bitVC還是可以寫64bit程式的(反之亦然),08/03 23:41
30F→:只是build的時候可能需要cross platform compiling....08/03 23:41
35F推:小弟我不記得當初裝怎麼選的了, 不過手邊的VC2005, 在08/03 23:55
36F→:程式集->VS2005->VSTools裡就有x64 CrossToolsCmd了:)08/03 23:56
37F→:另外Build->Config Manager裡, New config裡也找得到x6408/03 23:58
38F→:(我自己是32bit XP) 可以直接build出x64的App沒問題:)08/03 23:59
39F→:只是小弟我有個疑問, 原po真的需要同時malloc出這麼多的08/04 00:00
40F→:memory嗎? 就小弟所知, 目前一般玩家級的NV家顯卡, 好像08/04 00:00
41F→:也沒有>2G VRam的吧? (專門用於平行運算加速的卡不知XD)08/04 00:01
1F推:這是一種; 不過l大推文裡的那個也是很常見的例子:)07/31 21:09
2F→:個人認知是, 避免compiler對該變數的存取做最佳化, 使得07/31 21:10
3F→:該變數的每一次讀寫都確實在其存在的記憶體位址上發生作07/31 21:11
4F→:用. 所以禁止compiler直接塞結果/常數, 禁止compiler直07/31 21:11
5F→:接用register取代對address的存取...etc:)07/31 21:12
8F推:可是有的operation很常被使用說, 包成asm還要擔心平台相07/31 22:16
9F→:容問題說. Ex: 存取MMIO, 不同的MMIO有不同的讀寫方式,07/31 22:18
10F→:包成asm使用上不知要如何保持彈性@_@" 至於說asm, 是因07/31 22:19
11F→:為不知道為什麼build win64時不知道為什麼禁止我用int 307/31 22:19
12F→:所以不太確定是不是可以用同樣的asm來實作....@_@"07/31 22:20
17F推:可能小弟說的不清楚, 像MMIO整比DW r/w, 罩mask只監看某08/02 09:52
18F→:個bit, read回來update某幾個bit再回寫...等; 用C/C++直08/02 09:53
19F→:接寫只要var有掛volatile只要簡單的一兩行, 把這些操作08/02 09:55
20F→:都寫成asm是不是比較麻煩/可讀性也較差@_@"08/02 09:55
21F→:另外還有個鳥例子, 遇過某global var在main thread被跑08/02 09:56
22F→:loop檢查是否歸0, 然後有個DPC的thread時間到了會去更新08/02 09:57
23F→:它(像counter), 之前遇過一個bug就是因為該global var沒08/02 09:57
24F→:宣告成volatile, compiler在main thread的loop裡直接用08/02 09:57
25F→:reg暫存住那個global var, 導致DPC做完了該var都沒更新08/02 09:58
26F→:到, 然後就無窮迴圈卡死在那邊了XD08/02 09:58
31F推:喔~~是說只要read/write的部份直接用asm包喔, 誤會了XD08/02 22:23
2F推:小弟還以為FileDialog選定file後, 應該是拿到檔名以後,07/19 22:56
3F→:用CreateProcess之類的API launch它來執行說@_@"07/19 22:56
34F→:所以 2. 會變成兩種順序的答案都可以/可能是吧....@_@"07/19 00:59
67F推:朝聖XD07/19 22:40
6F推:除了斷點或明code int 3以外, 如果是debug build的bin,07/16 18:31
7F→:還要注意是不是有assertion跳起來....07/16 18:32
8F→:另外自動縮排是指? 選定一段範圍讓IDE自己幫你改好code07/16 18:32
9F→:的縮排? Edit->Advanced->Format Selection....07/16 18:33
10F→:另外, 這種想了解follow的, 常見的是自己埋debug code來07/16 18:35
11F→:print func enter/exit; 不清楚你的async API是什麼意思07/16 18:35
12F→:如果是指可以multi-threading這邊跑一下跳到另一個人hit07/16 18:36
13F→:bp之類的, 你就算能把所有func都bp起來也是亂跳啊Orz07/16 18:36
13F推:小弟我就買了一本, 可是沒心思去看放著養灰塵....Orz07/10 19:53
3F推:有分享有推XD07/09 00:34