libthread: simplify

Now that everything uses pthreads and pthreadperthread,
can delete various conditionals, all the custom context code,
and so on. Also update documents.

Fixes #355.

1 files changed, 0 insertions, 28 deletions

diff --git a/src/libthread/x86_64-ucontext.c b/src/libthread/x86_64-ucontext.c
deleted file mode 100644
index 5d1aaefc..00000000
--- a/src/libthread/x86_64-ucontext.c
+++ /dev/null
@@ -1,28 +0,0 @@
-#include "threadimpl.h"
-
-void
-makecontext(ucontext_t *uc, void (*fn)(void), int argc, ...)
-{
-	uintptr *sp;
-	va_list arg;
-
-	if(argc != 2)
-		sysfatal("libthread: makecontext misused");
-	va_start(arg, argc);
-	uc->mc.di = va_arg(arg, uint);
-	uc->mc.si = va_arg(arg, uint);
-	va_end(arg);
-
-	sp = USPALIGN(uc, 16);
-	*--sp = 0;  // fn's return address
-	*--sp = (uintptr)fn;  // return address of setcontext
-	uc->mc.sp = (uintptr)sp;
-}
-
-int
-swapcontext(ucontext_t *oucp, ucontext_t *ucp)
-{
-	if(getcontext(oucp) == 0)
-		setcontext(ucp);
-	return 0;
-}