Using ESP as a general register within a proc

[sinsi]

As long as I save and restore ESP and don't use any CALLs nothing will interrupt my proc and stuff up because of ESP?
This was a problem in DOS (INTs interrupting your proc) but Win32 doesn't have this problem does it?

[hutch--]

Yu can use ESP without any problems in win32 as long as you preserve it somewhere, either a global variable or in another type of register. For the obvious reason you cannot use the stack while ESP is in use elsewhere.

[sinsi]

As I surmised. Thanks.

[daydreamer]

instead of have your timecriticalcode that is speedup by using ESP in main or a proc and need to restore stack alot and easily a cause to crash the app , put that code inside a workerthread which the OS keeps with its own separate set of general regs, you can have the rest of your app do all apicalling and none-timecritical-code