| Lists: | pgsql-hackers-win32 |
|---|
| From: | "Merlin Moncure" <merlin(dot)moncure(at)rcsonline(dot)com> |
|---|---|
| To: | "Marsh Ray" <marsh-pg(at)mysteray(dot)com> |
| Cc: | "pgsql-hackers-win32" <pgsql-hackers-win32(at)postgresql(dot)org> |
| Subject: | Re: signals on windows |
| Date: | 2003-10-10 17:08:46 |
| Message-ID: | 303E00EBDD07B943924382E153890E5434A9ED@cuthbert.rcsinc.local |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Lists: | pgsql-hackers-win32 |
>It doesn't look like a "signal" is not a kernel primitive on NT, it's a
>feature of the CRT implemented in userspace with lower-level OS
primitives.
That is correct. Signals in the Unix sense of the word do not exist in
win32. A subset of them was emulated by the C runtime for compatibility
with dos applications. All real win32 process messaging goes through
messages.
Exception handling, however, is a kernel primitive, and handles some
cases like int/0 that normally would be handled by signals. Microsoft
hacked the C language to include exception support for this reason.
Merlin
| From: | Andrew Dunstan <andrew(at)dunslane(dot)net> |
|---|---|
| To: | pgsql-hackers-win32 <pgsql-hackers-win32(at)postgresql(dot)org> |
| Subject: | Re: signals on windows |
| Date: | 2003-10-10 17:37:53 |
| Message-ID: | 3F86EE71.6050700@dunslane.net |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Lists: | pgsql-hackers-win32 |
Merlin Moncure wrote:
>>It doesn't look like a "signal" is not a kernel primitive on NT, it's a
>>
>>
>>feature of the CRT implemented in userspace with lower-level OS
>>
>>
>primitives.
>
>That is correct. Signals in the Unix sense of the word do not exist in
>win32. A subset of them was emulated by the C runtime for compatibility
>with dos applications. All real win32 process messaging goes through
>messages.
>
>Exception handling, however, is a kernel primitive, and handles some
>cases like int/0 that normally would be handled by signals. Microsoft
>hacked the C language to include exception support for this reason.
>
>
>
OK, so the practical question facing me is "am I doing the right thing
for signal handling on Windows in initdb.c, or is something else needed?"
cheers
andrew