From 33f286000db35fe50639c237caa736deea304585 Mon Sep 17 00:00:00 2001
From: johannst <johannes.stoelp@gmail.com>
Date: Tue, 22 Sep 2020 23:48:09 +0200
Subject: split classes into separate files, add arch specific subdir

---
 lib/matcha.cc | 65 -----------------------------------------------------------
 1 file changed, 65 deletions(-)
 delete mode 100644 lib/matcha.cc

(limited to 'lib/matcha.cc')

diff --git a/lib/matcha.cc b/lib/matcha.cc
deleted file mode 100644
index 4315e9e..0000000
--- a/lib/matcha.cc
+++ /dev/null
@@ -1,65 +0,0 @@
-/* Copyright (c) 2020 Johannes Stoelp */
-
-#include "matcha.h"
-
-#include <cassert>
-#include <cstdint>
-#include <sys/mman.h>
-#include <unistd.h>  // sysconf
-
-// asm fns
-extern "C" void thread_create();
-extern "C" void yield(const void* new_stack, void* const* old_stack);
-
-long get_pagesize() {
-    return sysconf(_SC_PAGESIZE);
-}
-
-Thread::Thread() {
-    const long PAGE_SIZE = get_pagesize();
-    const long STACK_SIZE = 8 * PAGE_SIZE;
-
-    // create new stack
-    void* stack = mmap(nullptr, STACK_SIZE, PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1 /* fd */, 0 /* offset */);
-    assert(stack != MAP_FAILED);
-
-    // protect last stack page (lowest addr)
-    int ret = mprotect(stack, PAGE_SIZE, PROT_NONE);
-    assert(ret == 0);
-
-    // stack grows downwards
-    mStackPtr = static_cast<uint8_t*>(stack) + STACK_SIZE;
-    {
-        uint64_t* stack = static_cast<uint64_t*>(mStackPtr);
-        *(--stack) = (uint64_t)this;
-        *(--stack) = (uint64_t)Thread::entry;
-
-        // initial values for yield epilog
-        *(--stack) = (uint64_t)thread_create;
-        *(--stack) = (uint64_t)0;
-
-        // initial values for callee saved regs
-        *(--stack) = (uint64_t)0;                                        // rbx
-        *(--stack) = (uint64_t)(static_cast<uint64_t*>(mStackPtr) - 4);  // rbp
-        *(--stack) = (uint64_t)0;                                        // r12
-        *(--stack) = (uint64_t)0;                                        // r13
-        *(--stack) = (uint64_t)0;                                        // r14
-        *(--stack) = (uint64_t)0;                                        // r15
-
-        mStackPtr = static_cast<void*>(stack);
-    }
-}
-
-void Thread::entry(void* obj) {
-    Thread* t = static_cast<Thread*>(obj);
-    t->threadFn();
-}
-
-void Thread::yield() {
-    assert(mExecutor);
-    ::yield(mExecutor->getStackPtr(), &mStackPtr);
-}
-
-void Executor::yield_to(const Thread* t) const {
-    ::yield(t->mStackPtr, &mStackPtr);
-}
-- 
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