build: move coroutine backend selection to meson

To simplify the code, rename coroutine-win32.c to match the option
passed to configure.

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 0 insertions, 109 deletions

diff --git a/util/coroutine-win32.c b/util/coroutine-win32.c
deleted file mode 100644
index 7db2e8f8c8..0000000000
--- a/util/coroutine-win32.c
+++ /dev/null
@@ -1,109 +0,0 @@
-/*
- * Win32 coroutine initialization code
- *
- * Copyright (c) 2011 Kevin Wolf <kwolf@redhat.com>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#include "qemu/osdep.h"
-#include "qemu/coroutine_int.h"
-#include "qemu/coroutine-tls.h"
-
-typedef struct
-{
-    Coroutine base;
-
-    LPVOID fiber;
-    CoroutineAction action;
-} CoroutineWin32;
-
-QEMU_DEFINE_STATIC_CO_TLS(CoroutineWin32, leader);
-QEMU_DEFINE_STATIC_CO_TLS(Coroutine *, current);
-
-/* This function is marked noinline to prevent GCC from inlining it
- * into coroutine_trampoline(). If we allow it to do that then it
- * hoists the code to get the address of the TLS variable "current"
- * out of the while() loop. This is an invalid transformation because
- * the SwitchToFiber() call may be called when running thread A but
- * return in thread B, and so we might be in a different thread
- * context each time round the loop.
- */
-CoroutineAction __attribute__((noinline))
-qemu_coroutine_switch(Coroutine *from_, Coroutine *to_,
-                      CoroutineAction action)
-{
-    CoroutineWin32 *from = DO_UPCAST(CoroutineWin32, base, from_);
-    CoroutineWin32 *to = DO_UPCAST(CoroutineWin32, base, to_);
-
-    set_current(to_);
-
-    to->action = action;
-    SwitchToFiber(to->fiber);
-    return from->action;
-}
-
-static void CALLBACK coroutine_trampoline(void *co_)
-{
-    Coroutine *co = co_;
-
-    while (true) {
-        co->entry(co->entry_arg);
-        qemu_coroutine_switch(co, co->caller, COROUTINE_TERMINATE);
-    }
-}
-
-Coroutine *qemu_coroutine_new(void)
-{
-    const size_t stack_size = COROUTINE_STACK_SIZE;
-    CoroutineWin32 *co;
-
-    co = g_malloc0(sizeof(*co));
-    co->fiber = CreateFiber(stack_size, coroutine_trampoline, &co->base);
-    return &co->base;
-}
-
-void qemu_coroutine_delete(Coroutine *co_)
-{
-    CoroutineWin32 *co = DO_UPCAST(CoroutineWin32, base, co_);
-
-    DeleteFiber(co->fiber);
-    g_free(co);
-}
-
-Coroutine *qemu_coroutine_self(void)
-{
-    Coroutine *current = get_current();
-
-    if (!current) {
-        CoroutineWin32 *leader = get_ptr_leader();
-
-        current = &leader->base;
-        set_current(current);
-        leader->fiber = ConvertThreadToFiber(NULL);
-    }
-    return current;
-}
-
-bool qemu_in_coroutine(void)
-{
-    Coroutine *current = get_current();
-
-    return current && current->caller;
-}