Remove libco

This removes libco and all the usages of it (+pthreads).
Rewired all dynarecs and interpreter to return after every frame so that
libretro can process events. This required to make dynarec re-entrant.

Dynarecs were updated to check for new frame on every update (IRQ, cycle
exhaustion, I/O write, etc). The performance impact of doing so should
be minimal (and definitely outweight the libco gains). While at it,
fixed small issues to get a bit more perf: arm dynarec was not idling
correctly, mips was using stack when not needed, etc.

Tested on PSP (mips), OGA (armv7), Linux (x86 and interpreter). Not
tested on Android though.

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