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Diffstat (limited to 'libco/x86.c')
-rw-r--r--libco/x86.c117
1 files changed, 0 insertions, 117 deletions
diff --git a/libco/x86.c b/libco/x86.c
deleted file mode 100644
index ae16766..0000000
--- a/libco/x86.c
+++ /dev/null
@@ -1,117 +0,0 @@
-/*
- libco.x86 (2009-10-12)
- author: byuu
- license: public domain
-*/
-
-#define LIBCO_C
-#include <libco.h>
-#include <assert.h>
-#include <stdlib.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#if defined(_MSC_VER)
- #define fastcall __fastcall
-#elif defined(__GNUC__)
- #define fastcall __attribute__((fastcall))
-#else
- #error "libco: please define fastcall macro"
-#endif
-
-static thread_local long co_active_buffer[64];
-static thread_local cothread_t co_active_handle = 0;
-static void (fastcall *co_swap)(cothread_t, cothread_t) = 0;
-
-//ABI: fastcall
-static unsigned char co_swap_function[] = {
- 0x89, 0x22, /* mov [edx],esp */
- 0x8b, 0x21, /* mov esp,[ecx] */
- 0x58, /* pop eax */
- 0x89, 0x6a, 0x04, /* mov [edx+0x04],ebp */
- 0x89, 0x72, 0x08, /* mov [edx+0x08],esi */
- 0x89, 0x7a, 0x0c, /* mov [edx+0x0c],edi */
- 0x89, 0x5a, 0x10, /* mov [edx+0x10],ebx */
- 0x8b, 0x69, 0x04, /* mov ebp,[ecx+0x04] */
- 0x8b, 0x71, 0x08, /* mov esi,[ecx+0x08] */
- 0x8b, 0x79, 0x0c, /* mov edi,[ecx+0x0c] */
- 0x8b, 0x59, 0x10, /* mov ebx,[ecx+0x10] */
- 0xff, 0xe0, /* jmp eax */
-};
-
-#ifdef _WIN32
-#include <windows.h>
-
-void co_init(void)
-{
- DWORD old_privileges;
- VirtualProtect(co_swap_function,
- sizeof co_swap_function, PAGE_EXECUTE_READWRITE, &old_privileges);
-}
-#else
-#include <unistd.h>
-#include <sys/mman.h>
-
-void co_init(void)
-{
- unsigned long addr = (unsigned long)co_swap_function;
- unsigned long base = addr - (addr % sysconf(_SC_PAGESIZE));
- unsigned long size = (addr - base) + sizeof co_swap_function;
- mprotect((void*)base, size, PROT_READ | PROT_WRITE | PROT_EXEC);
-}
-#endif
-
-static void crash(void)
-{
- assert(0); /* called only if cothread_t entrypoint returns */
-}
-
-cothread_t co_active(void)
-{
- if(!co_active_handle)
- co_active_handle = &co_active_buffer;
- return co_active_handle;
-}
-
-cothread_t co_create(unsigned int size, void (*entrypoint)(void))
-{
- cothread_t handle;
- if(!co_swap)
- {
- co_init();
- co_swap = (void (fastcall*)(cothread_t, cothread_t))co_swap_function;
- }
-
- if(!co_active_handle)
- co_active_handle = &co_active_buffer;
-
- size += 256; /* allocate additional space for storage */
- size &= ~15; /* align stack to 16-byte boundary */
-
- if((handle = (cothread_t)malloc(size)))
- {
- long *p = (long*)((char*)handle + size); /* seek to top of stack */
- *--p = (long)crash; /* crash if entrypoint returns */
- *--p = (long)entrypoint; /* start of function */
- *(long*)handle = (long)p; /* stack pointer */
- }
-
- return handle;
-}
-
-void co_delete(cothread_t handle)
-{
- free(handle);
-}
-
-void co_switch(cothread_t handle)
-{
- register cothread_t co_previous_handle = co_active_handle;
- co_swap(co_active_handle = handle, co_previous_handle);
-}
-
-#ifdef __cplusplus
-}
-#endif