diff options
author | José Pekkarinen <jose.pekkarinen@nokia.com> | 2016-05-18 13:18:31 +0300 |
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committer | José Pekkarinen <jose.pekkarinen@nokia.com> | 2016-05-18 13:42:15 +0300 |
commit | 437fd90c0250dee670290f9b714253671a990160 (patch) | |
tree | b871786c360704244a07411c69fb58da9ead4a06 /qemu/coroutine-win32.c | |
parent | 5bbd6fe9b8bab2a93e548c5a53b032d1939eec05 (diff) |
These changes are the raw update to qemu-2.6.
Collission happened in the following patches:
migration: do cleanup operation after completion(738df5b9)
Bug fix.(1750c932f86)
kvmclock: add a new function to update env->tsc.(b52baab2)
The code provided by the patches was already in the upstreamed
version.
Change-Id: I3cc11841a6a76ae20887b2e245710199e1ea7f9a
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'qemu/coroutine-win32.c')
-rw-r--r-- | qemu/coroutine-win32.c | 101 |
1 files changed, 0 insertions, 101 deletions
diff --git a/qemu/coroutine-win32.c b/qemu/coroutine-win32.c deleted file mode 100644 index 17ace37de..000000000 --- a/qemu/coroutine-win32.c +++ /dev/null @@ -1,101 +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-common.h" -#include "block/coroutine_int.h" - -typedef struct -{ - Coroutine base; - - LPVOID fiber; - CoroutineAction action; -} CoroutineWin32; - -static __thread CoroutineWin32 leader; -static __thread 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_); - - 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 = 1 << 20; - 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) -{ - if (!current) { - current = &leader.base; - leader.fiber = ConvertThreadToFiber(NULL); - } - return current; -} - -bool qemu_in_coroutine(void) -{ - return current && current->caller; -} |