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Installing multiple instances of the same windows service on a server
So we've produced a windows service to feed data to our client application and everything is going great. The client has come up with a fun configuration request that requires two instances of this service running on the same server and configured to point at separate databases.
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Call Go functions from C
...w that isn't very helpful. Here is a short snippet without any unnecessary bits. It should make things a little clearer.
package foo
// extern int goCallbackHandler(int, int);
//
// static int doAdd(int a, int b) {
// return goCallbackHandler(a, b);
// }
import "C"
//export goCallbackHandler
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Specifically, what's dangerous about casting the result of malloc?
...be a no-op. So it might "just work", or the value could be corrupted (some bits lost, perhaps), or the caller could pick up completely the wrong value.
– Steve Jessop
Oct 15 '09 at 11:20
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Benefits of EBS vs. instance-store (and vice-versa) [closed]
...stance storage that I see are cost-savings. Otherwise EBS-backed instances win. Eric mentioned all the advantages.
[2012-07-16] I would phrase this answer a lot different today.
I haven't had any good experience with EBS-backed instances in the past year or so. The last downtimes on AWS pretty m...
How can I create directory tree in C++/Linux?
...<string.h>
/* "sysstat.h" == <sys/stat.h> with fixup for (old) Windows - inc mode_t */
#include "sysstat.h"
typedef struct stat Stat;
static int do_mkdir(const char *path, mode_t mode)
{
Stat st;
int status = 0;
if (stat(path, &st) != 0)
{
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What's the advantage of a Java enum versus a class with public static final fields?
... use them in switch statements; I'll throw that in as well.
This allows arbitrarily complex enums to be used in a clean way without using instanceof, potentially confusing if sequences, or non-string/int switching values. The canonical example is a state machine.
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How to run a program without an operating system?
... userland assembly instructions, we have:
.code16: tells GAS to output 16-bit code
cli: disable software interrupts. Those could make the processor start running again after the hlt
int $0x10: does a BIOS call. This is what prints the characters one by one.
The important link flags are:
--ofor...
Benchmarking (python vs. c++ using BLAS) and (numpy)
...achines
Linux (MKL, ATLAS, No-MKL, GotoBlas2):
OS: Ubuntu Lucid 10.4 64 Bit.
CPU: 2 x 4 Intel(R) Xeon(R) E5504 @ 2.00GHz (8 Cores)
RAM: 24 GB
Intel Compiler: 11.1/073
Scipy: 0.8
Numpy: 1.5
Mac Book Pro (Accelerate Framework):
OS: Mac OS X Snow Leopard (10.6)
CPU: 1 Intel Core 2 Duo 2.93 Ghz ...
How to shut down the computer from C#
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Works starting with windows XP, not available in win 2000 or lower:
This is the quickest way to do it:
Process.Start("shutdown","/s /t 0");
Otherwise use P/Invoke or WMI like others have said.
Edit: how to avoid creating a window
var p...
What is the purpose of the “Prefer 32-bit” setting in Visual Studio and how does it actually work?
... to AnyCPU now. There is an additional sub-type of AnyCPU,
“Any CPU 32-bit preferred”, which is the new default (overall, there
are now five options for the /platform C# compiler switch: x86,
Itanium, x64, anycpu, and anycpu32bitpreferred). When using the "Prefer 32-Bit"
flavor of AnyCPU...