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Kernel: Introduce threads, and refactor everything in support of it.

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The scheduler now operates on threads, rather than on processes.
Each process has a main thread, and can have any number of additional
threads. The process exits when the main thread exits.

This patch doesn't actually spawn any additional threads, it merely
does all the plumbing needed to make it possible. :^)
This commit is contained in:
Andreas Kling
2019-03-23 22:03:17 +01:00
parent b0de6aa8d8
commit 60d25f0f4a
32 changed files with 1356 additions and 1098 deletions
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16
SharedGraphics/PNGLoader.cpp
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@@ -9,6 +9,8 @@
#include <SharedGraphics/puff.c>
#include <serenity.h>
//#define PNG_STOPWATCH_DEBUG
struct PNG_IHDR {
NetworkOrdered<dword> width;
NetworkOrdered<dword> height;
@@ -246,7 +248,9 @@ template<bool has_alpha, byte filter_type>
[[gnu::noinline]] static void unfilter(PNGLoadingContext& context)
{
{
#ifdef PNG_STOPWATCH_DEBUG
Stopwatch sw("load_png_impl: unfilter: unpack");
#endif
// First unpack the scanlines to RGBA:
switch (context.color_type) {
case 2:
@@ -275,7 +279,9 @@ template<bool has_alpha, byte filter_type>
auto dummy_scanline = ByteBuffer::create_zeroed(context.width * sizeof(RGBA32));
#ifdef PNG_STOPWATCH_DEBUG
Stopwatch sw("load_png_impl: unfilter: process");
#endif
for (int y = 0; y < context.height; ++y) {
auto filter = context.scanlines[y].filter;
if (filter == 0) {
@@ -318,7 +324,9 @@ template<bool has_alpha, byte filter_type>
static RetainPtr<GraphicsBitmap> load_png_impl(const byte* data, int data_size)
{
#ifdef PNG_STOPWATCH_DEBUG
Stopwatch sw("load_png_impl: total");
#endif
const byte* data_ptr = data;
int data_remaining = data_size;
@@ -336,7 +344,9 @@ static RetainPtr<GraphicsBitmap> load_png_impl(const byte* data, int data_size)
data_remaining -= sizeof(png_header);
{
#ifdef PNG_STOPWATCH_DEBUG
Stopwatch sw("load_png_impl: read chunks");
#endif
Streamer streamer(data_ptr, data_remaining);
while (!streamer.at_end()) {
if (!process_chunk(streamer, context)) {
@@ -346,7 +356,9 @@ static RetainPtr<GraphicsBitmap> load_png_impl(const byte* data, int data_size)
}
{
#ifdef PNG_STOPWATCH_DEBUG
Stopwatch sw("load_png_impl: uncompress");
#endif
unsigned long srclen = context.compressed_data.size() - 6;
unsigned long destlen = context.decompression_buffer_size;
int ret = puff(context.decompression_buffer, &destlen, context.compressed_data.data() + 2, &srclen);
@@ -356,7 +368,9 @@ static RetainPtr<GraphicsBitmap> load_png_impl(const byte* data, int data_size)
}
{
#ifdef PNG_STOPWATCH_DEBUG
Stopwatch sw("load_png_impl: extract scanlines");
#endif
context.scanlines.ensure_capacity(context.height);
Streamer streamer(context.decompression_buffer, context.decompression_buffer_size);
for (int y = 0; y < context.height; ++y) {
@@ -372,7 +386,9 @@ static RetainPtr<GraphicsBitmap> load_png_impl(const byte* data, int data_size)
}
{
#ifdef PNG_STOPWATCH_DEBUG
Stopwatch sw("load_png_impl: create bitmap");
#endif
context.bitmap = GraphicsBitmap::create(context.has_alpha() ? GraphicsBitmap::Format::RGBA32 : GraphicsBitmap::Format::RGB32, { context.width, context.height });
}