Commit what we need for libretro-common

libretro/libretro-common/libco/psp1.c

@@ -0,0 +1,41 @@
+#define LIBCO_C
+#include "libco.h"
+
+#include <stdlib.h>
+#include <pspthreadman.h>
+
+typedef void (*entrypoint_t)(void);
+
+cothread_t co_active()
+{
+  return (void *) sceKernelGetThreadId();
+}
+
+static int thread_wrap(unsigned int argc, void *argp)
+{
+  entrypoint_t entrypoint = *(entrypoint_t *) argp;
+  sceKernelSleepThread();
+  entrypoint();
+  return 0;
+}
+
+cothread_t co_create(unsigned int size, void (*entrypoint)(void))
+{
+  SceUID new_thread_id = sceKernelCreateThread("cothread", thread_wrap, 0x12, size, 0, NULL);
+  sceKernelStartThread(new_thread_id, sizeof (entrypoint), &entrypoint);
+  return (void *) new_thread_id;
+}
+
+void co_delete(cothread_t handle)
+{
+  SceUID id = (SceUID) handle;
+  sceKernelTerminateDeleteThread(id);
+}
+
+void co_switch(cothread_t handle)
+{
+  SceUID id = (SceUID) handle;
+  sceKernelWakeupThread(id);
+  /* Sleep the currently active thread so the new thread can start */
+  sceKernelSleepThread();
+}