我一直在尝试CreateProcessA
从 Pony Language 的 FFI 中调用 Window。
我创建了一个 C 和一个 PonyLang 示例。C 示例效果很好:
#include <windows.h>
#include <stdio.h>
#include <tchar.h>
void wmain(void) {
STARTUPINFO info={0};
PROCESS_INFORMATION processInfo={0};
CreateProcessA("calc.exe", 0, 0, 0, 0, 0, 0, 0, &info, &processInfo);
if (status == 0)
printf("%d",GetLastError()); // never hits
}
我放在calc.exe
当前目录下。这在 Windows 上完美运行。但是,我的 PonyLang 实现继续返回非零GetLastError
:
use "lib:kernel32"
primitive _ProcessAttributes
primitive _ThreadAttributes
primitive _Inherit
primitive _Creation
primitive _Environment
primitive _CurrentDir
primitive _StartupInfo
primitive _ProcessInfo
primitive _HandleIn
primitive _HandleOut
primitive _HandleErr
primitive _Thread
primitive _Process
struct StartupInfo
var cb:I32 = 0
var lpReserved:Pointer[U8] tag= "".cstring()
var lpDesktop:Pointer[U8] tag= "".cstring()
var lpTitle:Pointer[U8] tag= "".cstring()
var dwX:I32 = 0
var dwY:I32 = 0
var dwXSize:I32=0
var dwYSize:I32=0
var dwXCountChars:I32=0
var dwYCountChars:I32=0
var dwFillAttribute:I32=0
var dwFlags:I32=0
var wShowWindow:I16=0
var cbReserved2:I16=0
var lpReserved2:Pointer[U8] tag="".cstring()
var hStdInput:Pointer[_HandleIn] = Pointer[_HandleIn]
var hStdOutput:Pointer[_HandleOut]= Pointer[_HandleOut]
var hStdError:Pointer[_HandleErr]= Pointer[_HandleErr]
struct ProcessInfo
var hProcess:Pointer[_Process] = Pointer[_Process]
var hThread:Pointer[_Thread] = Pointer[_Thread]
var dwProcessId:I32 = 0
var dwThreadId:I32 = 0
//var si:StartupInfo = StartupInfo
actor Main
new create(env: Env) =>
var si: StartupInfo = StartupInfo
var pi: ProcessInfo = ProcessInfo
var inherit:I8 = 0
var creation:I32 = 0
var one:I32 = 0
var two:I32 = 0
var three:I32 = 0
var four:I32 = 0
var z:I32 = 0
var p = @CreateProcessA[I8]("calc.exe",
z,
one,
two,
inherit,
creation,
three,
four,
addressof si,
addressof pi)
if p == 0 then
var err = @GetLastError[I32]() // hits this every time.
env.out.print("Last Error: " + err.string())
end
所以上面的代码是为 PonyLang 编译的,但GetLastError
大多数时候返回 2。有时GetLastError
返回 123。其他时候返回 998?有时错误代码不同,这似乎很奇怪。这些代码都意味着文件访问存在问题?
Calc.exe
位于当前目录中(与 c 示例相同的目录)。
此外,不仅错误代码不同,而且 calc.exe 在 C 版本中执行(运行良好),但在 PonyLang 版本中没有。这让我相信我的 PonyLang ffi 设置有问题。
有谁知道可能出了什么问题?