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d5c09c9ab1
byuu says: Changelog: - ruby/audio/xaudio2: ported to new ruby API - ruby/video/cgl: ported to new ruby API (untested, won't compile) - ruby/video/directdraw: ported to new ruby API - ruby/video/gdi: ported to new ruby API - ruby/video/glx: ported to new ruby API - ruby/video/wgl: ported to new ruby API - ruby/video/opengl: code cleanups The macOS CGL driver is sure to have compilation errors. If someone will post the compilation error log, I can hopefully fix it in one or two iterations of WIPs. I am unable to test the Xorg GLX driver, because my FreeBSD desktop video card drivers do not support OpenGL 3.2. If the driver doesn't work, I'm going to need help tracking down what broke from the older releases. The real fun is still yet to come ... all the Linux-only drivers, where I don't have a single Linux machine to test with. Todo: - libco/fiber - libco/ucontext (I should really just delete this) - tomoko: hide main UI window when in exclusive fullscreen mode
109 lines
2.9 KiB
C
109 lines
2.9 KiB
C
#define LIBCO_C
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#include "libco.h"
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#include "settings.h"
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#include <assert.h>
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#include <stdlib.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if defined(__clang__) || defined(__GNUC__)
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#define fastcall __attribute__((fastcall))
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#elif defined(_MSC_VER)
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#define fastcall __fastcall
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#else
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#error "libco: please define fastcall macro"
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#endif
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static thread_local long co_active_buffer[64];
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static thread_local cothread_t co_active_handle = 0;
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static void (fastcall *co_swap)(cothread_t, cothread_t) = 0;
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#ifdef LIBCO_MPROTECT
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alignas(4096)
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#else
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section(text)
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#endif
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/* ABI: fastcall */
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static const unsigned char co_swap_function[4096] = {
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0x89, 0x22, /* mov [edx],esp */
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0x8b, 0x21, /* mov esp,[ecx] */
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0x58, /* pop eax */
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0x89, 0x6a, 0x04, /* mov [edx+ 4],ebp */
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0x89, 0x72, 0x08, /* mov [edx+ 8],esi */
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0x89, 0x7a, 0x0c, /* mov [edx+12],edi */
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0x89, 0x5a, 0x10, /* mov [edx+16],ebx */
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0x8b, 0x69, 0x04, /* mov ebp,[ecx+ 4] */
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0x8b, 0x71, 0x08, /* mov esi,[ecx+ 8] */
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0x8b, 0x79, 0x0c, /* mov edi,[ecx+12] */
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0x8b, 0x59, 0x10, /* mov ebx,[ecx+16] */
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0xff, 0xe0, /* jmp eax */
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};
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#ifdef _WIN32
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#include <windows.h>
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static void co_init() {
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#ifdef LIBCO_MPROTECT
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DWORD old_privileges;
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VirtualProtect((void*)co_swap_function, sizeof co_swap_function, PAGE_EXECUTE_READ, &old_privileges);
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#endif
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}
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#else
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#include <unistd.h>
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#include <sys/mman.h>
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static void co_init() {
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#ifdef LIBCO_MPROTECT
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unsigned long addr = (unsigned long)co_swap_function;
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unsigned long base = addr - (addr % sysconf(_SC_PAGESIZE));
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unsigned long size = (addr - base) + sizeof co_swap_function;
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mprotect((void*)base, size, PROT_READ | PROT_EXEC);
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#endif
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}
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#endif
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static void crash() {
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assert(0); /* called only if cothread_t entrypoint returns */
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}
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cothread_t co_active() {
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if(!co_active_handle) co_active_handle = &co_active_buffer;
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return co_active_handle;
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}
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cothread_t co_create(unsigned int size, void (*entrypoint)(void)) {
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cothread_t handle;
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if(!co_swap) {
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co_init();
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co_swap = (void (fastcall*)(cothread_t, cothread_t))co_swap_function;
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}
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if(!co_active_handle) co_active_handle = &co_active_buffer;
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size += 256; /* allocate additional space for storage */
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size &= ~15; /* align stack to 16-byte boundary */
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if(handle = (cothread_t)malloc(size)) {
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long *p = (long*)((char*)handle + size); /* seek to top of stack */
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*--p = (long)crash; /* crash if entrypoint returns */
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*--p = (long)entrypoint; /* start of function */
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*(long*)handle = (long)p; /* stack pointer */
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}
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return handle;
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}
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void co_delete(cothread_t handle) {
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free(handle);
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}
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void co_switch(cothread_t handle) {
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register cothread_t co_previous_handle = co_active_handle;
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co_swap(co_active_handle = handle, co_previous_handle);
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}
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#ifdef __cplusplus
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}
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#endif
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