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Merge branch 'master' into d3d12

This commit is contained in:
gibbed 2018-11-24 19:52:46 -06:00
parent cb4fb451bf 08fb15fcca
commit af6dd50370
6 changed files with 319 additions and 193 deletions
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183
src/xenia/cpu/lzx.cc Normal file
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@ -0,0 +1,183 @@
/**
******************************************************************************
* Xenia : Xbox 360 Emulator Research Project *
******************************************************************************
* Copyright 2013 Ben Vanik. All rights reserved. *
* Released under the BSD license - see LICENSE in the root for more details. *
******************************************************************************
*/
#include "xenia/cpu/lzx.h"
#include <algorithm>
#include <climits>
#include "xenia/base/byte_order.h"
#include "xenia/base/logging.h"
#include "xenia/base/math.h"
#include "xenia/base/memory.h"
#include "xenia/kernel/util/xex2_info.h"
#include "third_party/mspack/lzx.h"
#include "third_party/mspack/mspack.h"
typedef struct mspack_memory_file_t {
struct mspack_system sys;
void* buffer;
off_t buffer_size;
off_t offset;
} mspack_memory_file;
mspack_memory_file* mspack_memory_open(struct mspack_system* sys, void* buffer,
const size_t buffer_size) {
assert_true(buffer_size < INT_MAX);
if (buffer_size >= INT_MAX) {
return NULL;
}
mspack_memory_file* memfile =
(mspack_memory_file*)calloc(1, sizeof(mspack_memory_file));
if (!memfile) {
return NULL;
}
memfile->buffer = buffer;
memfile->buffer_size = (off_t)buffer_size;
memfile->offset = 0;
return memfile;
}
void mspack_memory_close(mspack_memory_file* file) {
mspack_memory_file* memfile = (mspack_memory_file*)file;
free(memfile);
}
int mspack_memory_read(struct mspack_file* file, void* buffer, int chars) {
mspack_memory_file* memfile = (mspack_memory_file*)file;
const off_t remaining = memfile->buffer_size - memfile->offset;
const off_t total = std::min(static_cast<off_t>(chars), remaining);
std::memcpy(buffer, (uint8_t*)memfile->buffer + memfile->offset, total);
memfile->offset += total;
return (int)total;
}
int mspack_memory_write(struct mspack_file* file, void* buffer, int chars) {
mspack_memory_file* memfile = (mspack_memory_file*)file;
const off_t remaining = memfile->buffer_size - memfile->offset;
const off_t total = std::min(static_cast<off_t>(chars), remaining);
std::memcpy((uint8_t*)memfile->buffer + memfile->offset, buffer, total);
memfile->offset += total;
return (int)total;
}
void* mspack_memory_alloc(struct mspack_system* sys, size_t chars) {
return std::calloc(chars, 1);
}
void mspack_memory_free(void* ptr) { free(ptr); }
void mspack_memory_copy(void* src, void* dest, size_t chars) {
std::memcpy(dest, src, chars);
}
struct mspack_system* mspack_memory_sys_create() {
struct mspack_system* sys =
(struct mspack_system*)std::calloc(1, sizeof(struct mspack_system));
if (!sys) {
return NULL;
}
sys->read = mspack_memory_read;
sys->write = mspack_memory_write;
sys->alloc = mspack_memory_alloc;
sys->free = mspack_memory_free;
sys->copy = mspack_memory_copy;
return sys;
}
void mspack_memory_sys_destroy(struct mspack_system* sys) { free(sys); }
int lzx_decompress(const void* lzx_data, size_t lzx_len, void* dest,
size_t dest_len, uint32_t window_size, void* window_data,
size_t window_data_len) {
uint32_t window_bits = 0;
uint32_t temp_sz = window_size;
for (size_t m = 0; m < 32; m++, window_bits++) {
temp_sz >>= 1;
if (temp_sz == 0x00000000) {
break;
}
}
int result_code = 1;
mspack_system* sys = mspack_memory_sys_create();
mspack_memory_file* lzxsrc =
mspack_memory_open(sys, (void*)lzx_data, lzx_len);
mspack_memory_file* lzxdst = mspack_memory_open(sys, dest, dest_len);
lzxd_stream* lzxd =
lzxd_init(sys, (struct mspack_file*)lzxsrc, (struct mspack_file*)lzxdst,
window_bits, 0, 0x8000, (off_t)dest_len, 0);
if (lzxd) {
if (window_data) {
// zero the window and then copy window_data to the end of it
std::memset(lzxd->window, 0, window_data_len);
std::memcpy(lzxd->window + (window_size - window_data_len), window_data,
window_data_len);
lzxd->ref_data_size = (uint32_t)window_data_len;
}
result_code = lzxd_decompress(lzxd, (off_t)dest_len);
lzxd_free(lzxd);
lzxd = NULL;
}
if (lzxsrc) {
mspack_memory_close(lzxsrc);
lzxsrc = NULL;
}
if (lzxdst) {
mspack_memory_close(lzxdst);
lzxdst = NULL;
}
if (sys) {
mspack_memory_sys_destroy(sys);
sys = NULL;
}
return result_code;
}
int lzxdelta_apply_patch(xe::xex2_delta_patch* patch, size_t patch_len,
uint32_t window_size, void* dest) {
void* patch_end = (char*)patch + patch_len;
auto* cur_patch = patch;
while (patch_end > cur_patch) {
int patch_sz = -4; // 0 byte patches need us to remove 4 byte from next
// patch addr because of patch_data field
if (cur_patch->compressed_len == 0 && cur_patch->uncompressed_len == 0 &&
cur_patch->new_addr == 0 && cur_patch->old_addr == 0)
break;
switch (cur_patch->compressed_len) {
case 0: // fill with 0
std::memset((char*)dest + cur_patch->new_addr, 0,
cur_patch->uncompressed_len);
break;
case 1: // copy from old -> new
std::memcpy((char*)dest + cur_patch->new_addr,
(char*)dest + cur_patch->old_addr,
cur_patch->uncompressed_len);
break;
default: // delta patch
patch_sz =
cur_patch->compressed_len - 4; // -4 because of patch_data field
int result = lzx_decompress(
cur_patch->patch_data, cur_patch->compressed_len,
(char*)dest + cur_patch->new_addr, cur_patch->uncompressed_len,
window_size, (char*)dest + cur_patch->old_addr,
cur_patch->uncompressed_len);
if (result) {
return result;
}
break;
}
cur_patch++;
cur_patch = (xe::xex2_delta_patch*)((char*)cur_patch +
patch_sz); // TODO: make this less ugly
}
return 0;
}

29
src/xenia/cpu/lzx.h Normal file
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@ -0,0 +1,29 @@
/**
******************************************************************************
* Xenia : Xbox 360 Emulator Research Project *
******************************************************************************
* Copyright 2013 Ben Vanik. All rights reserved. *
* Released under the BSD license - see LICENSE in the root for more details. *
******************************************************************************
*/
#ifndef XENIA_CPU_LZX_H_
#define XENIA_CPU_LZX_H_
#include <string>
#include <vector>
#include "xenia/cpu/module.h"
namespace xe {
struct xex2_delta_patch;
} // namespace xe
int lzx_decompress(const void* lzx_data, size_t lzx_len, void* dest,
size_t dest_len, uint32_t window_size, void* window_data,
size_t window_data_len);
int lzxdelta_apply_patch(xe::xex2_delta_patch* patch, size_t patch_len,
uint32_t window_size, void* dest);
#endif // XENIA_CPU_LZX_H_

167
src/xenia/cpu/xex_module.cc
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@ -17,6 +17,7 @@
#include "xenia/base/memory.h"
#include "xenia/cpu/cpu_flags.h"
#include "xenia/cpu/export_resolver.h"
#include "xenia/cpu/lzx.h"
#include "xenia/cpu/processor.h"
#include "xenia/kernel/kernel_state.h"
#include "xenia/kernel/xmodule.h"
@ -24,8 +25,6 @@
#include "third_party/crypto/TinySHA1.hpp"
#include "third_party/crypto/rijndael-alg-fst.c"
#include "third_party/crypto/rijndael-alg-fst.h"
#include "third_party/mspack/lzx.h"
#include "third_party/mspack/mspack.h"
#include "third_party/pe/pe_image.h"
static const uint8_t xe_xex2_retail_key[16] = {
@ -35,165 +34,6 @@ static const uint8_t xe_xex2_devkit_key[16] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
typedef struct mspack_memory_file_t {
struct mspack_system sys;
void* buffer;
off_t buffer_size;
off_t offset;
} mspack_memory_file;
mspack_memory_file* mspack_memory_open(struct mspack_system* sys, void* buffer,
const size_t buffer_size) {
assert_true(buffer_size < INT_MAX);
if (buffer_size >= INT_MAX) {
return NULL;
}
mspack_memory_file* memfile =
(mspack_memory_file*)calloc(1, sizeof(mspack_memory_file));
if (!memfile) {
return NULL;
}
memfile->buffer = buffer;
memfile->buffer_size = (off_t)buffer_size;
memfile->offset = 0;
return memfile;
}
void mspack_memory_close(mspack_memory_file* file) {
mspack_memory_file* memfile = (mspack_memory_file*)file;
free(memfile);
}
int mspack_memory_read(struct mspack_file* file, void* buffer, int chars) {
mspack_memory_file* memfile = (mspack_memory_file*)file;
const off_t remaining = memfile->buffer_size - memfile->offset;
const off_t total = std::min(static_cast<off_t>(chars), remaining);
memcpy(buffer, (uint8_t*)memfile->buffer + memfile->offset, total);
memfile->offset += total;
return (int)total;
}
int mspack_memory_write(struct mspack_file* file, void* buffer, int chars) {
mspack_memory_file* memfile = (mspack_memory_file*)file;
const off_t remaining = memfile->buffer_size - memfile->offset;
const off_t total = std::min(static_cast<off_t>(chars), remaining);
memcpy((uint8_t*)memfile->buffer + memfile->offset, buffer, total);
memfile->offset += total;
return (int)total;
}
void* mspack_memory_alloc(struct mspack_system* sys, size_t chars) {
return calloc(chars, 1);
}
void mspack_memory_free(void* ptr) { free(ptr); }
void mspack_memory_copy(void* src, void* dest, size_t chars) {
memcpy(dest, src, chars);
}
struct mspack_system* mspack_memory_sys_create() {
struct mspack_system* sys =
(struct mspack_system*)calloc(1, sizeof(struct mspack_system));
if (!sys) {
return NULL;
}
sys->read = mspack_memory_read;
sys->write = mspack_memory_write;
sys->alloc = mspack_memory_alloc;
sys->free = mspack_memory_free;
sys->copy = mspack_memory_copy;
return sys;
}
void mspack_memory_sys_destroy(struct mspack_system* sys) { free(sys); }
int lzx_decompress(const void* lzx_data, size_t lzx_len, void* dest,
size_t dest_len, uint32_t window_size, void* window_data,
size_t window_data_len) {
uint32_t window_bits = 0;
uint32_t temp_sz = window_size;
for (size_t m = 0; m < 32; m++, window_bits++) {
temp_sz >>= 1;
if (temp_sz == 0x00000000) {
break;
}
}
int result_code = 1;
mspack_system* sys = mspack_memory_sys_create();
mspack_memory_file* lzxsrc =
mspack_memory_open(sys, (void*)lzx_data, lzx_len);
mspack_memory_file* lzxdst = mspack_memory_open(sys, dest, dest_len);
lzxd_stream* lzxd =
lzxd_init(sys, (struct mspack_file*)lzxsrc, (struct mspack_file*)lzxdst,
window_bits, 0, 0x8000, (off_t)dest_len, 0);
if (lzxd) {
if (window_data) {
// zero the window and then copy window_data to the end of it
memset(lzxd->window, 0, window_data_len);
memcpy(lzxd->window + (window_size - window_data_len), window_data,
window_data_len);
}
result_code = lzxd_decompress(lzxd, (off_t)dest_len);
lzxd_free(lzxd);
lzxd = NULL;
}
if (lzxsrc) {
mspack_memory_close(lzxsrc);
lzxsrc = NULL;
}
if (lzxdst) {
mspack_memory_close(lzxdst);
lzxdst = NULL;
}
if (sys) {
mspack_memory_sys_destroy(sys);
sys = NULL;
}
return result_code;
}
int lzxdelta_apply_patch(xe::xex2_delta_patch* patch, size_t patch_len,
uint32_t window_size, void* dest) {
void* patch_end = (char*)patch + patch_len;
auto* cur_patch = patch;
while (patch_end > cur_patch) {
int patch_sz = -4; // 0 byte patches need us to remove 4 byte from next
// patch addr because of patch_data field
if (cur_patch->compressed_len == 0 && cur_patch->uncompressed_len == 0 &&
cur_patch->new_addr == 0 && cur_patch->old_addr == 0)
break;
switch (cur_patch->compressed_len) {
case 0: // fill with 0
memset((char*)dest + cur_patch->new_addr, 0,
cur_patch->uncompressed_len);
break;
case 1: // copy from old -> new
memcpy((char*)dest + cur_patch->new_addr,
(char*)dest + cur_patch->old_addr, cur_patch->uncompressed_len);
break;
default: // delta patch
patch_sz =
cur_patch->compressed_len - 4; // -4 because of patch_data field
int result = lzx_decompress(
cur_patch->patch_data, cur_patch->compressed_len,
(char*)dest + cur_patch->new_addr, cur_patch->uncompressed_len,
window_size, (char*)dest + cur_patch->old_addr,
cur_patch->uncompressed_len);
if (result) {
return result;
}
break;
}
cur_patch++;
cur_patch = (xe::xex2_delta_patch*)((char*)cur_patch +
patch_sz); // TODO: make this less ugly
}
return 0;
}
void aes_decrypt_buffer(const uint8_t* session_key, const uint8_t* input_buffer,
const size_t input_size, uint8_t* output_buffer,
const size_t output_size) {
@ -1144,9 +984,8 @@ bool XexModule::LoadContinue() {
}
}
auto library_data = reinterpret_cast<uint8_t*>(opt_import_libraries) +
opt_import_libraries->string_table.size + 12;
uint32_t library_offset = 0;
auto library_data = reinterpret_cast<uint8_t*>(opt_import_libraries);
uint32_t library_offset = opt_import_libraries->string_table.size + 12;
while (library_offset < opt_import_libraries->size) {
auto library =
reinterpret_cast<xex2_import_library*>(library_data + library_offset);

4
src/xenia/kernel/util/shim_utils.h
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@ -564,6 +564,10 @@ using xe::cpu::ExportTag;
DECLARE_EXPORT(xboxkrnl, name, category, \
xe::cpu::ExportTag::tag1 | xe::cpu::ExportTag::tag2 | \
xe::cpu::ExportTag::tag3)
#define DECLARE_XBOXKRNL_EXPORT4(name, category, tag1, tag2, tag3, tag4) \
DECLARE_EXPORT(xboxkrnl, name, category, \
xe::cpu::ExportTag::tag1 | xe::cpu::ExportTag::tag2 | \
xe::cpu::ExportTag::tag3 | xe::cpu::ExportTag::tag4)
} // namespace kernel
} // namespace xe

28
src/xenia/kernel/xam/xam_info.cc
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@ -28,28 +28,30 @@ namespace xam {
constexpr uint32_t X_LANGUAGE_ENGLISH = 1;
constexpr uint32_t X_LANGUAGE_JAPANESE = 2;
// Empty stub schema binary.
uint8_t schema_bin[] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x2C, 0x00, 0x00, 0x00, 0x2C, 0x00, 0x00,
0x00, 0x2C, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x2C, 0x00,
0x00, 0x00, 0x00, 0x00, 0x2C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18,
};
dword_result_t XamGetOnlineSchema() {
static uint32_t schema_guest = 0;
static uint32_t schema_ptr_guest = 0;
if (!schema_guest) {
// create a dummy schema, 8 bytes of 0 seems to work fine
// (with another 8 bytes for schema ptr/schema size)
schema_guest = kernel_state()->memory()->SystemHeapAlloc(16);
schema_ptr_guest = schema_guest + 8;
schema_guest =
kernel_state()->memory()->SystemHeapAlloc(8 + sizeof(schema_bin));
auto schema = kernel_state()->memory()->TranslateVirtual(schema_guest);
memset(schema, 0, 16);
// store schema ptr + size
xe::store_and_swap<uint32_t>(schema + 0x8, schema_guest);
xe::store_and_swap<uint32_t>(schema + 0xC, 0x8);
std::memcpy(schema + 8, schema_bin, sizeof(schema_bin));
xe::store_and_swap<uint32_t>(schema + 0, schema_guest + 8);
xe::store_and_swap<uint32_t>(schema + 4, sizeof(schema_bin));
}
// return pointer to the schema ptr/schema size struct
return schema_ptr_guest;
return schema_guest;
}
DECLARE_XAM_EXPORT2(XamGetOnlineSchema, kNone, kImplemented, kSketchy);
DECLARE_XAM_EXPORT1(XamGetOnlineSchema, kNone, kImplemented);
void XamFormatDateString(dword_t unk, qword_t filetime, lpvoid_t buffer,
dword_t buffer_length) {

101
src/xenia/kernel/xboxkrnl/xboxkrnl_threading.cc
View File

@ -373,8 +373,7 @@ void KeInitializeEvent(pointer_t<X_KEVENT> event_ptr, dword_t event_type,
}
DECLARE_XBOXKRNL_EXPORT1(KeInitializeEvent, kThreading, kImplemented);
dword_result_t KeSetEvent(pointer_t<X_KEVENT> event_ptr, dword_t increment,
dword_t wait) {
uint32_t keSetEvent(X_KEVENT* event_ptr, uint32_t increment, uint32_t wait) {
auto ev = XObject::GetNativeObject<XEvent>(kernel_state(), event_ptr);
if (!ev) {
assert_always();
@ -383,6 +382,11 @@ dword_result_t KeSetEvent(pointer_t<X_KEVENT> event_ptr, dword_t increment,
return ev->Set(increment, !!wait);
}
dword_result_t KeSetEvent(pointer_t<X_KEVENT> event_ptr, dword_t increment,
dword_t wait) {
return keSetEvent(event_ptr, increment, wait);
}
DECLARE_XBOXKRNL_EXPORT2(KeSetEvent, kThreading, kImplemented, kHighFrequency);
dword_result_t KePulseEvent(pointer_t<X_KEVENT> event_ptr, dword_t increment,
@ -508,9 +512,8 @@ void KeInitializeSemaphore(pointer_t<X_KSEMAPHORE> semaphore_ptr, dword_t count,
}
DECLARE_XBOXKRNL_EXPORT1(KeInitializeSemaphore, kThreading, kImplemented);
dword_result_t KeReleaseSemaphore(pointer_t<X_KSEMAPHORE> semaphore_ptr,
dword_t increment, dword_t adjustment,
dword_t wait) {
uint32_t keReleaseSemaphore(X_KSEMAPHORE* semaphore_ptr, uint32_t increment,
uint32_t adjustment, uint32_t wait) {
auto sem =
XObject::GetNativeObject<XSemaphore>(kernel_state(), semaphore_ptr);
if (!sem) {
@ -523,6 +526,12 @@ dword_result_t KeReleaseSemaphore(pointer_t<X_KSEMAPHORE> semaphore_ptr,
return sem->ReleaseSemaphore(adjustment);
}
dword_result_t KeReleaseSemaphore(pointer_t<X_KSEMAPHORE> semaphore_ptr,
dword_t increment, dword_t adjustment,
dword_t wait) {
return keReleaseSemaphore(semaphore_ptr, increment, adjustment, wait);
}
DECLARE_XBOXKRNL_EXPORT1(KeReleaseSemaphore, kThreading, kImplemented);
dword_result_t NtCreateSemaphore(lpdword_t handle_ptr,
@ -719,9 +728,9 @@ dword_result_t NtCancelTimer(dword_t timer_handle,
}
DECLARE_XBOXKRNL_EXPORT1(NtCancelTimer, kThreading, kImplemented);
dword_result_t KeWaitForSingleObject(lpvoid_t object_ptr, dword_t wait_reason,
dword_t processor_mode, dword_t alertable,
lpqword_t timeout_ptr) {
uint32_t keWaitForSingleObject(void* object_ptr, uint32_t wait_reason,
uint32_t processor_mode, uint32_t alertable,
uint64_t* timeout) {
auto object = XObject::GetNativeObject<XObject>(kernel_state(), object_ptr);
if (!object) {
@ -730,12 +739,19 @@ dword_result_t KeWaitForSingleObject(lpvoid_t object_ptr, dword_t wait_reason,
return X_STATUS_ABANDONED_WAIT_0;
}
uint64_t timeout = timeout_ptr ? static_cast<uint64_t>(*timeout_ptr) : 0u;
X_STATUS result = object->Wait(wait_reason, processor_mode, alertable,
timeout_ptr ? &timeout : nullptr);
X_STATUS result =
object->Wait(wait_reason, processor_mode, alertable, timeout);
return result;
}
dword_result_t KeWaitForSingleObject(lpvoid_t object_ptr, dword_t wait_reason,
dword_t processor_mode, dword_t alertable,
lpqword_t timeout_ptr) {
uint64_t timeout = timeout_ptr ? static_cast<uint64_t>(*timeout_ptr) : 0u;
return keWaitForSingleObject(object_ptr, wait_reason, processor_mode,
alertable, &timeout);
}
DECLARE_XBOXKRNL_EXPORT3(KeWaitForSingleObject, kThreading, kImplemented,
kBlocking, kHighFrequency);
@ -844,13 +860,12 @@ dword_result_t NtSignalAndWaitForSingleObjectEx(dword_t signal_handle,
DECLARE_XBOXKRNL_EXPORT3(NtSignalAndWaitForSingleObjectEx, kThreading,
kImplemented, kBlocking, kHighFrequency);
dword_result_t KfAcquireSpinLock(lpdword_t lock_ptr) {
uint32_t keKfAcquireSpinLock(uint32_t* lock) {
// XELOGD(
// "KfAcquireSpinLock(%.8X)",
// lock_ptr);
// Lock.
auto lock = reinterpret_cast<uint32_t*>(lock_ptr.host_address());
while (!xe::atomic_cas(0, 1, lock)) {
// Spin!
// TODO(benvanik): error on deadlock?
@ -863,18 +878,27 @@ dword_result_t KfAcquireSpinLock(lpdword_t lock_ptr) {
return old_irql;
}
dword_result_t KfAcquireSpinLock(lpdword_t lock_ptr) {
auto lock = reinterpret_cast<uint32_t*>(lock_ptr.host_address());
return keKfAcquireSpinLock(lock);
}
DECLARE_XBOXKRNL_EXPORT3(KfAcquireSpinLock, kThreading, kImplemented, kBlocking,
kHighFrequency);
void KfReleaseSpinLock(lpdword_t lock_ptr, dword_t old_irql) {
void keKfReleaseSpinLock(uint32_t* lock, dword_t old_irql) {
// Restore IRQL.
XThread* thread = XThread::GetCurrentThread();
thread->LowerIrql(old_irql);
// Unlock.
auto lock = reinterpret_cast<uint32_t*>(lock_ptr.host_address());
xe::atomic_dec(lock);
}
void KfReleaseSpinLock(lpdword_t lock_ptr, dword_t old_irql) {
auto lock = reinterpret_cast<uint32_t*>(lock_ptr.host_address());
keKfReleaseSpinLock(lock, old_irql);
}
DECLARE_XBOXKRNL_EXPORT2(KfReleaseSpinLock, kThreading, kImplemented,
kHighFrequency);
@ -1092,7 +1116,7 @@ struct X_ERWLOCK {
be<uint32_t> readers_entry_count; // 0xC
X_KEVENT writer_event; // 0x10
X_KSEMAPHORE reader_semaphore; // 0x20
be<uint32_t> spin_lock; // 0x34
uint32_t spin_lock; // 0x34
};
void ExInitializeReadWriteLock(pointer_t<X_ERWLOCK> lock_ptr) {
@ -1105,6 +1129,51 @@ void ExInitializeReadWriteLock(pointer_t<X_ERWLOCK> lock_ptr) {
}
DECLARE_XBOXKRNL_EXPORT1(ExInitializeReadWriteLock, kThreading, kImplemented);
void ExAcquireReadWriteLockExclusive(pointer_t<X_ERWLOCK> lock_ptr) {
auto old_irql = keKfAcquireSpinLock(&lock_ptr->spin_lock);
lock_ptr->lock_count++;
keKfReleaseSpinLock(&lock_ptr->spin_lock, old_irql);
if (!lock_ptr->lock_count) {
return;
}
lock_ptr->writers_waiting_count++;
keWaitForSingleObject(&lock_ptr->writer_event, 0, 0, 0, nullptr);
}
DECLARE_XBOXKRNL_EXPORT4(ExAcquireReadWriteLockExclusive, kThreading,
kImplemented, kBlocking, kHighFrequency, kSketchy);
void ExReleaseReadWriteLock(pointer_t<X_ERWLOCK> lock_ptr) {
auto old_irql = keKfAcquireSpinLock(&lock_ptr->spin_lock);
lock_ptr->lock_count--;
if (lock_ptr->lock_count < 0) {
keKfReleaseSpinLock(&lock_ptr->spin_lock, old_irql);
return;
}
if (!lock_ptr->readers_entry_count) {
auto readers_waiting_count = lock_ptr->readers_waiting_count;
if (readers_waiting_count) {
lock_ptr->readers_waiting_count = 0;
lock_ptr->readers_entry_count = readers_waiting_count;
keKfReleaseSpinLock(&lock_ptr->spin_lock, old_irql);
keReleaseSemaphore(&lock_ptr->reader_semaphore, 1, readers_waiting_count,
0);
return;
}
}
auto count = lock_ptr->readers_entry_count--;
keKfReleaseSpinLock(&lock_ptr->spin_lock, old_irql);
if (!count) {
keSetEvent(&lock_ptr->writer_event, 1, 0);
}
}
DECLARE_XBOXKRNL_EXPORT2(ExReleaseReadWriteLock, kThreading, kImplemented,
kSketchy);
// NOTE: This function is very commonly inlined, and probably won't be called!
pointer_result_t InterlockedPushEntrySList(
pointer_t<X_SLIST_HEADER> plist_ptr, pointer_t<X_SINGLE_LIST_ENTRY> entry) {