jstimpfle

# file exists only to name the gist

jstimpfle

// Example how screen updates can be done even when DefaultWindowProc is
// resizing or moving the window. We catch WM_ENTERMENULOOP and WM_ENTERSIZEMOVE
// to start a timer to notify us every so often. This way we regain some of the
// control that DefaultWindowProc takes from us in these modal loops.
//
// When resizing or moving the window, you should see a glimmering red
// background that turns from dark to bright and back again in 180 screen
// updates. That cycle should take a few seconds - it's hard to say how long
// exactly since we're not explicitly synchronizing with the monitor and I'm not
// sure how often we can receive WM_PAINT. The 4ms from the SetTimer() call are

jstimpfle

/* win32_proc_wait.cpp - Get notified when a Windows process terminates */

#include <Windows.h>

typedef void Proc_Terminated_Callback(void *data);

/* Proc_Wait - Waiting for a process to finish on Win32.

Zero out a Proc_Wait structure before use.
Call proc_wait_open() to register an asynchronous wait operation for a process handle.

jstimpfle

// Simple reference for what I think is a sane approach to structuring GUIs.
// Platform code is cleanly separated from the GUI code.
// Win32 backend (the OpenGL code is unused)
// Easy to port to other platforms - X11, SDL, OpenGL...

#include <Windows.h>
#include <windowsx.h>  // GET_X_LPARAM(), GET_Y_LPARAM()
#include <mshtmcid.h>  // IDM_CUT, IDM_COPY etc

#include <GL/gl.h>

jstimpfle

#include <assert.h>
#include <inttypes.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>

#ifdef _MSC_VER
#define NORETURN __declspec(noreturn)

jstimpfle

#include <assert.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>

#define NORETURN __attribute__((noreturn))
#define ARRAY_LENGTH(a) ((int) (sizeof (a) / sizeof (a)[0]))

jstimpfle

//
// Baseline code (compiles on Linux) for sending UDP packets at a relatively
// high rate. With some modifications, this will be suited as a starting point
// to experiment with UDP-based transfer protocols.
//
// Achieves ~350 MiB/s (350K packets/s) on my laptop from 2011 (Lenovo x220,
// Sandy Bridge i5-2520M).
//
// Compile this as a binary "test" and run two instances in parallel (in two
// terminals).

jstimpfle

// Experiment: Intrusively linked list, implemented using C++ templates
// 2019, Jens Stimpfle

#include <assert.h>
#include <stddef.h>
#include <stdio.h>

struct ListLink {
        ListLink *next;
        ListLink *prev;

jstimpfle

// Intrusively doubly linked lists boilerplate. Similar to Linux list.h
// 2020, Jens Stimpfle

typedef struct _ListNode ListNode;
typedef struct _List List;

struct _ListNode {
        ListNode *next;
        ListNode *prev;
};

jstimpfle

/*
Ringbuffers are surprisingly hard to code because wraparound
can split the readable / writeable region in two. This is the
cutest implementation that I've come up with so far.

NOT ACTUALLY TESTED

- jstimpfle, 2020-09
*/