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Rewrite InterlockedPopEntrySList

This commit is contained in:
Dr. Chat 2015-07-05 21:32:26 -05:00
parent 870aa092bb
commit 6ddd0b4700
2 changed files with 33 additions and 21 deletions
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29
src/xenia/kernel/xboxkrnl_threading.cc
View File

@ -1348,38 +1348,31 @@ SHIM_CALL KeRemoveQueueDpc_shim(PPCContext* ppc_context,
xe::mutex global_list_mutex_;
// http://www.nirsoft.net/kernel_struct/vista/SLIST_HEADER.html
struct SLIST_HEADER {
xe::be<uint32_t> next;
xe::be<uint16_t> depth;
xe::be<uint16_t> sequence;
};
pointer_result_t InterlockedPopEntrySList(pointer_t<SLIST_HEADER> plist_ptr) {
pointer_result_t InterlockedPopEntrySList(pointer_t<X_SLIST_HEADER> plist_ptr) {
std::lock_guard<xe::mutex> lock(global_list_mutex_);
uint32_t first = plist_ptr->next;
if (first == 0) {
if (plist_ptr->next.next == 0) {
// List empty!
return 0;
}
// Get the second element.
uint8_t* p = kernel_memory()->TranslateVirtual(first);
auto second = xe::load_and_swap<uint32_t>(p);
// Get the first element.
auto result = kernel_memory()->TranslateVirtual<X_SINGLE_LIST_ENTRY*>(
plist_ptr->next.next);
plist_ptr->next = second;
uint32_t popped = plist_ptr->next.next;
plist_ptr->next.next = result->next;
// Return the one we popped
return first;
return popped;
}
DECLARE_XBOXKRNL_EXPORT(InterlockedPopEntrySList, ExportTag::kImplemented);
pointer_result_t InterlockedFlushSList(pointer_t<SLIST_HEADER> plist_ptr) {
pointer_result_t InterlockedFlushSList(pointer_t<X_SLIST_HEADER> plist_ptr) {
std::lock_guard<xe::mutex> lock(global_list_mutex_);
uint32_t next = plist_ptr->next;
plist_ptr->next = 0;
uint32_t next = plist_ptr->next.next;
plist_ptr->next.next = 0;
return next;
}

25
src/xenia/xbox.h
View File

@ -280,9 +280,9 @@ struct X_ANSI_STRING {
};
struct X_UNICODE_STRING {
xe::be<uint16_t> length;
xe::be<uint16_t> maximum_length;
xe::be<uint32_t> pointer;
xe::be<uint16_t> length; // 0x0
xe::be<uint16_t> maximum_length; // 0x2
xe::be<uint32_t> pointer; // 0x4
void reset() {
length = 0;
@ -322,9 +322,28 @@ static_assert_size(X_VIDEO_MODE, 48);
struct X_LIST_ENTRY {
be<uint32_t> flink_ptr; // next entry / head
be<uint32_t> blink_ptr; // previous entry / head
// Assumes X_LIST_ENTRY is within guest memory!
void initialize(uint8_t* virtual_membase) {
flink_ptr = (uint32_t)((uint8_t*)this - virtual_membase);
blink_ptr = (uint32_t)((uint8_t*)this - virtual_membase);
}
};
static_assert_size(X_LIST_ENTRY, 8);
struct X_SINGLE_LIST_ENTRY {
be<uint32_t> next; // 0x0 pointer to next entry
};
static_assert_size(X_SINGLE_LIST_ENTRY, 4);
// http://www.nirsoft.net/kernel_struct/vista/SLIST_HEADER.html
struct X_SLIST_HEADER {
X_SINGLE_LIST_ENTRY next; // 0x0
be<uint16_t> depth; // 0x4
be<uint16_t> sequence; // 0x6
};
static_assert_size(X_SLIST_HEADER, 8);
#pragma pack(pop)
} // namespace xe