[PATCH v2 0/2] MR3806: combase/roapi: Initialize implicit MTA in RoGetActivationFactory().
Fixes Starfield not being able to take photos in photo mode (due to failing to creating windowscodecs' image factory due to COM apartment being initialized). Turns out on Windows RoGetActivationFactory() initializes implicit MTA apartment when called from STA thread, and so after that called once COM is implicitly uninitialized for any (new) thread until COM is uninitialized in the thread which called RoGetActivationFactory (or that thread exited). This is not the case on Win8 (where the function was first introduced) but looks consistent after that.
-- v2: combase: Create implicit MTA in STA apartment in RoGetActivationFactory().
From: Paul Gofman pgofman@codeweavers.com
--- dlls/combase/tests/roapi.c | 198 +++++++++++++++++++++++++++++++++++++ 1 file changed, 198 insertions(+)
diff --git a/dlls/combase/tests/roapi.c b/dlls/combase/tests/roapi.c index f10cbb4507b..3959d7435b0 100644 --- a/dlls/combase/tests/roapi.c +++ b/dlls/combase/tests/roapi.c @@ -116,12 +116,210 @@ static void test_ActivationFactories(void) RoUninitialize(); }
+static APTTYPE check_thread_apttype; +static APTTYPEQUALIFIER check_thread_aptqualifier; +static HRESULT check_thread_hr; + +static DWORD WINAPI check_apartment_thread(void *dummy) +{ + check_thread_apttype = 0xdeadbeef; + check_thread_aptqualifier = 0xdeadbeef; + check_thread_hr = CoGetApartmentType(&check_thread_apttype, &check_thread_aptqualifier); + return 0; +} + +#define check_thread_apartment(a) check_thread_apartment_(__LINE__, FALSE, a) +#define check_thread_apartment_broken(a) check_thread_apartment_(__LINE__, TRUE, a) +static void check_thread_apartment_(unsigned int line, BOOL broken_fail, HRESULT expected_hr_thread) +{ + HANDLE thread; + + check_thread_hr = 0xdeadbeef; + thread = CreateThread(NULL, 0, check_apartment_thread, NULL, 0, NULL); + WaitForSingleObject(thread, INFINITE); + CloseHandle(thread); + ok_(__FILE__, line)(check_thread_hr == expected_hr_thread + || broken(broken_fail && expected_hr_thread == S_OK && check_thread_hr == CO_E_NOTINITIALIZED), + "got %#lx, expected %#lx.\n", check_thread_hr, expected_hr_thread); + if (SUCCEEDED(check_thread_hr)) + { + ok_(__FILE__, line)(check_thread_apttype == APTTYPE_MTA, "got %d.\n", check_thread_apttype); + ok_(__FILE__, line)(check_thread_aptqualifier == APTTYPEQUALIFIER_IMPLICIT_MTA, "got %d.\n", check_thread_aptqualifier); + } +} + +static HANDLE mta_init_thread_init_done_event, mta_init_thread_done_event; + +static DWORD WINAPI mta_init_thread(void *dummy) +{ + HRESULT hr; + + hr = CoInitializeEx(NULL, COINIT_MULTITHREADED); + ok(hr == S_OK, "got %#lx.\n", hr); + SetEvent(mta_init_thread_init_done_event); + + WaitForSingleObject(mta_init_thread_done_event, INFINITE); + CoUninitialize(); + return 0; +} + +static DWORD WINAPI mta_init_implicit_thread(void *dummy) +{ + IActivationFactory *factory; + HSTRING str; + HRESULT hr; + + hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED); + ok(hr == S_OK, "got %#lx.\n", hr); + + hr = WindowsCreateString(L"Does.Not.Exist", ARRAY_SIZE(L"Does.Not.Exist") - 1, &str); + ok(hr == S_OK, "got %#lx.\n", hr); + hr = RoGetActivationFactory(str, &IID_IActivationFactory, (void **)&factory); + ok(hr == REGDB_E_CLASSNOTREG, "got %#lx.\n", hr); + WindowsDeleteString(str); + + SetEvent(mta_init_thread_init_done_event); + WaitForSingleObject(mta_init_thread_done_event, INFINITE); + + /* No CoUninitialize(), testing cleanup on thread exit. */ + return 0; +} + +static void test_implicit_mta(void) +{ + static const struct + { + BOOL ro_init; + BOOL mta; + BOOL ro_uninit; + } + tests[] = + { + { TRUE, TRUE, TRUE }, + { TRUE, FALSE, FALSE }, + { TRUE, FALSE, TRUE }, + { FALSE, FALSE, FALSE }, + { FALSE, FALSE, TRUE }, + }; + APTTYPEQUALIFIER aptqualifier; + IActivationFactory *factory; + APTTYPE apttype; + unsigned int i; + HANDLE thread; + HSTRING str; + HRESULT hr; + + hr = WindowsCreateString(L"Does.Not.Exist", ARRAY_SIZE(L"Does.Not.Exist") - 1, &str); + ok(hr == S_OK, "got %#lx.\n", hr); + /* RoGetActivationFactory doesn't implicitly initialize COM. */ + hr = RoGetActivationFactory(str, &IID_IActivationFactory, (void **)&factory); + todo_wine ok(hr == CO_E_NOTINITIALIZED, "got %#lx.\n", hr); + + check_thread_apartment(CO_E_NOTINITIALIZED); + + /* RoGetActivationFactory initializes implicit MTA. */ + for (i = 0; i < ARRAY_SIZE(tests); ++i) + { + winetest_push_context("test %u", i); + if (tests[i].ro_init) + hr = RoInitialize(tests[i].mta ? RO_INIT_MULTITHREADED : RO_INIT_SINGLETHREADED); + else + hr = CoInitializeEx(NULL, tests[i].mta ? COINIT_MULTITHREADED : COINIT_APARTMENTTHREADED); + ok(hr == S_OK, "got %#lx.\n", hr); + check_thread_apartment(tests[i].mta ? S_OK : CO_E_NOTINITIALIZED); + hr = RoGetActivationFactory(str, &IID_IActivationFactory, (void **)&factory); + ok(hr == REGDB_E_CLASSNOTREG, "got %#lx.\n", hr); + todo_wine_if(!tests[i].mta) check_thread_apartment_broken(S_OK); /* Broken on Win8. */ + hr = RoGetActivationFactory(str, &IID_IActivationFactory, (void **)&factory); + ok(hr == REGDB_E_CLASSNOTREG, "got %#lx.\n", hr); + todo_wine_if(!tests[i].mta) check_thread_apartment_broken(S_OK); /* Broken on Win8. */ + if (tests[i].ro_uninit) + RoUninitialize(); + else + CoUninitialize(); + check_thread_apartment(CO_E_NOTINITIALIZED); + winetest_pop_context(); + } + + mta_init_thread_init_done_event = CreateEventW(NULL, FALSE, FALSE, NULL); + mta_init_thread_done_event = CreateEventW(NULL, FALSE, FALSE, NULL); + + /* RoGetActivationFactory references implicit MTA in a current thread + * even if implicit MTA was already initialized: check with STA init + * after RoGetActivationFactory(). */ + thread = CreateThread(NULL, 0, mta_init_thread, NULL, 0, NULL); + ok(!!thread, "failed.\n"); + WaitForSingleObject(mta_init_thread_init_done_event, INFINITE); + check_thread_apartment(S_OK); + + hr = RoGetActivationFactory(str, &IID_IActivationFactory, (void **)&factory); + ok(hr == REGDB_E_CLASSNOTREG, "got %#lx.\n", hr); + check_thread_apartment(S_OK); + + hr = CoGetApartmentType(&apttype, &aptqualifier); + ok(hr == S_OK, "got %#lx.\n", hr); + ok(apttype == APTTYPE_MTA, "got %d.\n", apttype); + ok(aptqualifier == APTTYPEQUALIFIER_IMPLICIT_MTA, "got %d.\n", aptqualifier); + + hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED); + ok(hr == S_OK, "got %#lx.\n", hr); + + hr = CoGetApartmentType(&apttype, &aptqualifier); + ok(hr == S_OK, "got %#lx.\n", hr); + ok(apttype == APTTYPE_MAINSTA, "got %d.\n", apttype); + ok(aptqualifier == APTTYPEQUALIFIER_NONE, "got %d.\n", aptqualifier); + + SetEvent(mta_init_thread_done_event); + WaitForSingleObject(thread, INFINITE); + CloseHandle(thread); + todo_wine check_thread_apartment_broken(S_OK); /* Broken on Win8. */ + CoUninitialize(); + check_thread_apartment(CO_E_NOTINITIALIZED); + + /* RoGetActivationFactory references implicit MTA in a current thread + * even if implicit MTA was already initialized: check with STA init + * before RoGetActivationFactory(). */ + thread = CreateThread(NULL, 0, mta_init_thread, NULL, 0, NULL); + ok(!!thread, "failed.\n"); + WaitForSingleObject(mta_init_thread_init_done_event, INFINITE); + check_thread_apartment(S_OK); + + hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED); + ok(hr == S_OK, "got %#lx.\n", hr); + + hr = RoGetActivationFactory(str, &IID_IActivationFactory, (void **)&factory); + ok(hr == REGDB_E_CLASSNOTREG, "got %#lx.\n", hr); + check_thread_apartment(S_OK); + + SetEvent(mta_init_thread_done_event); + WaitForSingleObject(thread, INFINITE); + CloseHandle(thread); + todo_wine check_thread_apartment_broken(S_OK); /* Broken on Win8. */ + CoUninitialize(); + check_thread_apartment(CO_E_NOTINITIALIZED); + + /* Test implicit MTA apartment thread exit. */ + thread = CreateThread(NULL, 0, mta_init_implicit_thread, NULL, 0, NULL); + ok(!!thread, "failed.\n"); + WaitForSingleObject(mta_init_thread_init_done_event, INFINITE); + todo_wine check_thread_apartment_broken(S_OK); /* Broken on Win8. */ + SetEvent(mta_init_thread_done_event); + WaitForSingleObject(thread, INFINITE); + CloseHandle(thread); + check_thread_apartment(CO_E_NOTINITIALIZED); + + CloseHandle(mta_init_thread_init_done_event); + CloseHandle(mta_init_thread_done_event); + WindowsDeleteString(str); +} + START_TEST(roapi) { BOOL ret;
load_resource(L"wine.combase.test.dll");
+ test_implicit_mta(); test_ActivationFactories();
SetLastError(0xdeadbeef);
From: Paul Gofman pgofman@codeweavers.com
--- dlls/combase/apartment.c | 32 ++++++++++++++++++++++++++++++++ dlls/combase/combase.c | 3 +++ dlls/combase/combase_private.h | 2 ++ dlls/combase/roapi.c | 5 +++++ dlls/combase/tests/roapi.c | 12 ++++++------ dlls/ole32/compobj_private.h | 1 + 6 files changed, 49 insertions(+), 6 deletions(-)
diff --git a/dlls/combase/apartment.c b/dlls/combase/apartment.c index d679ef3407a..40d80114363 100644 --- a/dlls/combase/apartment.c +++ b/dlls/combase/apartment.c @@ -1157,6 +1157,11 @@ void leave_apartment(struct tlsdata *data) if (data->ole_inits) WARN( "Uninitializing apartment while Ole is still initialized\n" ); apartment_release(data->apt); + if (data->implicit_mta) + { + apartment_release(data->implicit_mta); + data->implicit_mta = NULL; + } data->apt = NULL; data->flags &= ~(OLETLS_DISABLE_OLE1DDE | OLETLS_APARTMENTTHREADED | OLETLS_MULTITHREADED); } @@ -1288,3 +1293,30 @@ void apartment_global_cleanup(void) apartment_release_dlls(); DeleteCriticalSection(&apt_cs); } + +HRESULT reference_implicit_mta_from_sta(void) +{ + struct tlsdata *data; + HRESULT hr; + struct apartment *apt, *apt_mt; + + if (FAILED(hr = com_get_tlsdata(&data))) + return hr; + if ((apt = data->apt) && (data->implicit_mta || apt->multi_threaded)) + return S_OK; + + EnterCriticalSection(&apt_cs); + if (apt && !mta) + apt_mt = mta = apartment_construct(COINIT_MULTITHREADED); + else if ((apt_mt = mta)) + apartment_addref(mta); + LeaveCriticalSection(&apt_cs); + + if (!apt_mt) + { + ERR("Apartment not initialized.\n"); + return CO_E_NOTINITIALIZED; + } + data->implicit_mta = apt_mt; + return S_OK; +} diff --git a/dlls/combase/combase.c b/dlls/combase/combase.c index f1b5828e0f8..08c83181c52 100644 --- a/dlls/combase/combase.c +++ b/dlls/combase/combase.c @@ -407,6 +407,9 @@ static void com_cleanup_tlsdata(void)
if (tlsdata->apt) apartment_release(tlsdata->apt); + if (tlsdata->implicit_mta) + apartment_release(tlsdata->implicit_mta); + if (tlsdata->errorinfo) IErrorInfo_Release(tlsdata->errorinfo); if (tlsdata->state) diff --git a/dlls/combase/combase_private.h b/dlls/combase/combase_private.h index 53932e9a357..8fdd5f68dd2 100644 --- a/dlls/combase/combase_private.h +++ b/dlls/combase/combase_private.h @@ -92,6 +92,7 @@ struct tlsdata struct list spies; /* Spies installed with CoRegisterInitializeSpy */ DWORD spies_lock; DWORD cancelcount; + struct apartment *implicit_mta; /* mta referenced by roapi from sta thread */ };
extern HRESULT WINAPI InternalTlsAllocData(struct tlsdata **data); @@ -161,6 +162,7 @@ void apartment_release(struct apartment *apt); struct apartment * apartment_get_current_or_mta(void); HRESULT apartment_increment_mta_usage(CO_MTA_USAGE_COOKIE *cookie); void apartment_decrement_mta_usage(CO_MTA_USAGE_COOKIE cookie); +HRESULT reference_implicit_mta_from_sta(void); struct apartment * apartment_get_mta(void); HRESULT apartment_get_inproc_class_object(struct apartment *apt, const struct class_reg_data *regdata, REFCLSID rclsid, REFIID riid, DWORD class_context, void **ppv); diff --git a/dlls/combase/roapi.c b/dlls/combase/roapi.c index b80ca2e8325..bb7351db8a0 100644 --- a/dlls/combase/roapi.c +++ b/dlls/combase/roapi.c @@ -24,6 +24,8 @@ #include "roerrorapi.h" #include "winstring.h"
+#include "combase_private.h" + #include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(combase); @@ -154,6 +156,9 @@ HRESULT WINAPI RoGetActivationFactory(HSTRING classid, REFIID iid, void **class_ if (!iid || !class_factory) return E_INVALIDARG;
+ if (FAILED(hr = reference_implicit_mta_from_sta())) + return hr; + hr = get_library_for_classid(WindowsGetStringRawBuffer(classid, NULL), &library); if (FAILED(hr)) { diff --git a/dlls/combase/tests/roapi.c b/dlls/combase/tests/roapi.c index 3959d7435b0..ef0035dae4e 100644 --- a/dlls/combase/tests/roapi.c +++ b/dlls/combase/tests/roapi.c @@ -213,7 +213,7 @@ static void test_implicit_mta(void) ok(hr == S_OK, "got %#lx.\n", hr); /* RoGetActivationFactory doesn't implicitly initialize COM. */ hr = RoGetActivationFactory(str, &IID_IActivationFactory, (void **)&factory); - todo_wine ok(hr == CO_E_NOTINITIALIZED, "got %#lx.\n", hr); + ok(hr == CO_E_NOTINITIALIZED, "got %#lx.\n", hr);
check_thread_apartment(CO_E_NOTINITIALIZED);
@@ -229,10 +229,10 @@ static void test_implicit_mta(void) check_thread_apartment(tests[i].mta ? S_OK : CO_E_NOTINITIALIZED); hr = RoGetActivationFactory(str, &IID_IActivationFactory, (void **)&factory); ok(hr == REGDB_E_CLASSNOTREG, "got %#lx.\n", hr); - todo_wine_if(!tests[i].mta) check_thread_apartment_broken(S_OK); /* Broken on Win8. */ + check_thread_apartment_broken(S_OK); /* Broken on Win8. */ hr = RoGetActivationFactory(str, &IID_IActivationFactory, (void **)&factory); ok(hr == REGDB_E_CLASSNOTREG, "got %#lx.\n", hr); - todo_wine_if(!tests[i].mta) check_thread_apartment_broken(S_OK); /* Broken on Win8. */ + check_thread_apartment_broken(S_OK); /* Broken on Win8. */ if (tests[i].ro_uninit) RoUninitialize(); else @@ -272,7 +272,7 @@ static void test_implicit_mta(void) SetEvent(mta_init_thread_done_event); WaitForSingleObject(thread, INFINITE); CloseHandle(thread); - todo_wine check_thread_apartment_broken(S_OK); /* Broken on Win8. */ + check_thread_apartment_broken(S_OK); /* Broken on Win8. */ CoUninitialize(); check_thread_apartment(CO_E_NOTINITIALIZED);
@@ -294,7 +294,7 @@ static void test_implicit_mta(void) SetEvent(mta_init_thread_done_event); WaitForSingleObject(thread, INFINITE); CloseHandle(thread); - todo_wine check_thread_apartment_broken(S_OK); /* Broken on Win8. */ + check_thread_apartment_broken(S_OK); /* Broken on Win8. */ CoUninitialize(); check_thread_apartment(CO_E_NOTINITIALIZED);
@@ -302,7 +302,7 @@ static void test_implicit_mta(void) thread = CreateThread(NULL, 0, mta_init_implicit_thread, NULL, 0, NULL); ok(!!thread, "failed.\n"); WaitForSingleObject(mta_init_thread_init_done_event, INFINITE); - todo_wine check_thread_apartment_broken(S_OK); /* Broken on Win8. */ + check_thread_apartment_broken(S_OK); /* Broken on Win8. */ SetEvent(mta_init_thread_done_event); WaitForSingleObject(thread, INFINITE); CloseHandle(thread); diff --git a/dlls/ole32/compobj_private.h b/dlls/ole32/compobj_private.h index eae1a5998c0..f4ff37ec647 100644 --- a/dlls/ole32/compobj_private.h +++ b/dlls/ole32/compobj_private.h @@ -63,6 +63,7 @@ struct oletls struct list spies; /* Spies installed with CoRegisterInitializeSpy */ DWORD spies_lock; DWORD cancelcount; + struct apartment *implicit_mta; /* mta referenced by roapi from sta thread */ };
/* Global Interface Table Functions */
Hi,
It looks like your patch introduced the new failures shown below. Please investigate and fix them before resubmitting your patch. If they are not new, fixing them anyway would help a lot. Otherwise please ask for the known failures list to be updated.
The tests also ran into some preexisting test failures. If you know how to fix them that would be helpful. See the TestBot job for the details:
The full results can be found at: https://testbot.winehq.org/JobDetails.pl?Key=137325
Your paranoid android.
=== debian11b (64 bit WoW report) ===
user32: msg.c:6908: Test failed: SetFocus(hwnd) on a button: 4: the msg 0x0007 was expected, but got msg 0x030f instead msg.c:6908: Test failed: SetFocus(hwnd) on a button: 4: the msg 0x0007 was expected, but got msg 0x001c instead msg.c:6908: Test failed: SetFocus(hwnd) on a button: 4: the msg 0x0007 was expected, but got msg 0x0086 instead msg.c:6908: Test failed: SetFocus(hwnd) on a button: 4: the msg 0x0007 was expected, but got msg 0x0006 instead msg.c:6908: Test failed: SetFocus(hwnd) on a button: 4: the msg 0x0007 was expected, but got hook 0x0009 instead msg.c:6908: Test failed: SetFocus(hwnd) on a button: 4: the msg 0x0007 should NOT have been sent by DefWindowProc msg.c:6908: Test failed: SetFocus(hwnd) on a button: 4: the msg 0x0007 was expected in child msg.c:6908: Test failed: SetFocus(hwnd) on a button: 5: the msg 0x0138 was expected, but got msg 0x0008 instead msg.c:6908: Test failed: SetFocus(hwnd) on a button: 5: the msg 0x0138 was expected, but got winevent_hook 0x8005 instead msg.c:6908: Test failed: SetFocus(hwnd) on a button: 5: the msg 0x0138 was expected, but got msg 0x0007 instead
Nikolay Sivov (@nsivov) commented about dlls/combase/tests/roapi.c:
{ FALSE, FALSE, FALSE },{ FALSE, FALSE, TRUE },- };
- APTTYPEQUALIFIER aptqualifier;
- IActivationFactory *factory;
- APTTYPE apttype;
- unsigned int i;
- HANDLE thread;
- HSTRING str;
- HRESULT hr;
- hr = WindowsCreateString(L"Does.Not.Exist", ARRAY_SIZE(L"Does.Not.Exist") - 1, &str);
- ok(hr == S_OK, "got %#lx.\n", hr);
- /* RoGetActivationFactory doesn't implicitly initialize COM. */
- hr = RoGetActivationFactory(str, &IID_IActivationFactory, (void **)&factory);
- todo_wine ok(hr == CO_E_NOTINITIALIZED, "got %#lx.\n", hr);
Doesn't this contradict MR subject?
Nikolay Sivov (@nsivov) commented about dlls/combase/apartment.c:
- EnterCriticalSection(&apt_cs);
- if (apt && !mta)
apt_mt = mta = apartment_construct(COINIT_MULTITHREADED);- else if ((apt_mt = mta))
apartment_addref(mta);- LeaveCriticalSection(&apt_cs);
- if (!apt_mt)
- {
ERR("Apartment not initialized.\n");return CO_E_NOTINITIALIZED;- }
- data->implicit_mta = apt_mt;
- return S_OK;
+}
There is apartment_increment_mta_usage(). Could it be used here?
On Wed Sep 13 05:27:55 2023 +0000, Nikolay Sivov wrote:
Doesn't this contradict MR subject?
Yes, I guess I can change MR subject to the patch subject. To summarize what tests show:
- if COM is not initialized at all (like in CoCreateInstance doesn't work) RoGetActivationFactory fails with CO_E_NOTINITIALIZED; - if COM is inited with STA apartment, implicit MTA is created (or referenced if exists); - if COM is inited with implicit MTA apartment it is referenced.
On Wed Sep 13 05:27:56 2023 +0000, Nikolay Sivov wrote:
There is apartment_increment_mta_usage(). Could it be used here?
It seems to me it doesn't fit nicely. Using it as is results in the need to decref it after in certain cases which looks clumsy and also may lead to spurious implicit mta creation and destruction which introduces a race. Mind that apartment_construct is called here only if there is an initialized (STA) apartment, and if there is none it only checks / refs existing one. And the check can't be done outside of critical section.
On Wed Sep 13 14:51:39 2023 +0000, Paul Gofman wrote:
It seems to me it doesn't fit nicely. Using it as is results in the need to decref it after in certain cases which looks clumsy and also may lead to spurious implicit mta creation and destruction which introduces a race. Mind that apartment_construct is called here only if there is an initialized (STA) apartment, and if there is none it only checks / refs existing one. And the check can't be done outside of critical section.
Or in fact I can use apartment_increment_mta_usage() by nesting critical section if you think is better.
On Wed Sep 13 15:09:03 2023 +0000, Paul Gofman wrote:
Or in fact I can use apartment_increment_mta_usage() by nesting critical section if you think is better.
Right, I just find it hard to believe that RoActivate* needs something significantly different. Ultimately we should implement it properly at some point, so objects are hosted correctly. I suspect that thread mode used by first RoInit() call is supposed to be used for all activations that follow, but STA/MTA are still reused between RoActivate* and CoCreate*.
On Wed Sep 13 16:17:21 2023 +0000, Nikolay Sivov wrote:
Right, I just find it hard to believe that RoActivate* needs something significantly different. Ultimately we should implement it properly at some point, so objects are hosted correctly. I suspect that thread mode used by first RoInit() call is supposed to be used for all activations that follow, but STA/MTA are still reused between RoActivate* and CoCreate*.
Oh, looking again into it, there is also a cookie which needs to be freed, and storing the cookie in thread data instead of pointer will warrant an extra flag to indicate that the mta should be unreferenced. So is it really an improvement?
On Wed Sep 13 16:26:12 2023 +0000, Paul Gofman wrote:
Oh, looking again into it, there is also a cookie which needs to be freed, and storing the cookie in thread data instead of pointer will warrant an extra flag to indicate that the mta should be unreferenced. So is it really an improvement?
I don't think you need flags, cookie can't be zero.
On Wed Sep 13 16:30:02 2023 +0000, Nikolay Sivov wrote:
I don't think you need flags, cookie can't be zero.
But it is opaque in theory, or do you suggest to just always apartment_decrement_mta_usage possibly with initial zero cookie?
-
Marvin -
Nikolay Sivov (＠nsivov) -
Paul Gofman
-
Paul Gofman (＠gofman)