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msync-staging.patch
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From e1ace074e745b48e3484cc80a302b2aa7bcf3ca5 Mon Sep 17 00:00:00 2001
From: Marc-Aurel Zent <[email protected]>
Date: Mon, 12 Aug 2024 13:45:30 +0200
Subject: [PATCH] add msync
---
dlls/ntdll/Makefile.in | 1 +
dlls/ntdll/unix/esync.c | 15 +-
dlls/ntdll/unix/loader.c | 2 +
dlls/ntdll/unix/msync.c | 1689 ++++++++++++++++++++++++++++++++
dlls/ntdll/unix/msync.h | 50 +
dlls/ntdll/unix/server.c | 4 +
dlls/ntdll/unix/sync.c | 72 +-
dlls/ntdll/unix/unix_private.h | 2 +
dlls/ntdll/unix/virtual.c | 2 +
include/wine/server_protocol.h | 103 +-
server/Makefile.in | 1 +
server/async.c | 2 +
server/atom.c | 1 +
server/change.c | 1 +
server/clipboard.c | 1 +
server/completion.c | 1 +
server/console.c | 34 +
server/debugger.c | 2 +
server/device.c | 26 +
server/directory.c | 2 +
server/esync.c | 3 +-
server/event.c | 40 +
server/fd.c | 30 +
server/file.c | 1 +
server/file.h | 1 +
server/handle.c | 1 +
server/hook.c | 1 +
server/mailslot.c | 4 +
server/main.c | 7 +
server/mapping.c | 3 +
server/msync.c | 992 +++++++++++++++++++
server/msync.h | 36 +
server/mutex.c | 1 +
server/named_pipe.c | 5 +
server/object.h | 2 +
server/process.c | 17 +
server/process.h | 1 +
server/protocol.def | 54 +
server/queue.c | 52 +
server/registry.c | 1 +
server/request.c | 1 +
server/request.h | 38 +
server/semaphore.c | 1 +
server/serial.c | 1 +
server/signal.c | 1 +
server/sock.c | 3 +
server/symlink.c | 1 +
server/thread.c | 38 +
server/thread.h | 2 +
server/timer.c | 19 +
server/token.c | 1 +
server/trace.c | 72 ++
server/window.c | 1 +
server/winstation.c | 2 +
54 files changed, 3437 insertions(+), 7 deletions(-)
create mode 100644 dlls/ntdll/unix/msync.c
create mode 100644 dlls/ntdll/unix/msync.h
create mode 100644 server/msync.c
create mode 100644 server/msync.h
diff --git a/dlls/ntdll/Makefile.in b/dlls/ntdll/Makefile.in
index 78b3fdf94aa..061c730bf63 100644
--- a/dlls/ntdll/Makefile.in
+++ b/dlls/ntdll/Makefile.in
@@ -50,6 +50,7 @@ SOURCES = \
unix/env.c \
unix/esync.c \
unix/file.c \
+ unix/msync.c \
unix/loader.c \
unix/loadorder.c \
unix/process.c \
diff --git a/dlls/ntdll/unix/esync.c b/dlls/ntdll/unix/esync.c
index f4748e405ef..2e116a56f4b 100644
--- a/dlls/ntdll/unix/esync.c
+++ b/dlls/ntdll/unix/esync.c
@@ -51,6 +51,7 @@
#include "unix_private.h"
#include "esync.h"
+#include "msync.h"
WINE_DEFAULT_DEBUG_CHANNEL(esync);
@@ -60,13 +61,16 @@ int do_esync(void)
static int do_esync_cached = -1;
if (do_esync_cached == -1)
- do_esync_cached = getenv("WINEESYNC") && atoi(getenv("WINEESYNC"));
+ do_esync_cached = getenv("WINEESYNC") && atoi(getenv("WINEESYNC")) && !do_msync();
return do_esync_cached;
#else
static int once;
if (!once++)
- FIXME("eventfd not supported on this platform.\n");
+ {
+ if (getenv("WINEESYNC") && atoi(getenv("WINEESYNC")) && !do_msync())
+ FIXME("eventfd not supported on this platform.\n");
+ }
return 0;
#endif
}
@@ -571,6 +575,9 @@ NTSTATUS esync_reset_event( HANDLE handle )
if ((ret = get_object( handle, &obj ))) return ret;
event = obj->shm;
+ if (obj->type != ESYNC_MANUAL_EVENT && obj->type != ESYNC_AUTO_EVENT)
+ return STATUS_OBJECT_TYPE_MISMATCH;
+
if (obj->type == ESYNC_MANUAL_EVENT)
{
/* Acquire the spinlock. */
@@ -861,7 +868,7 @@ static NTSTATUS __esync_wait_objects( DWORD count, const HANDLE *handles, BOOLEA
return ret;
}
- if (objs[count - 1] && objs[count - 1]->type == ESYNC_QUEUE)
+ if (count && objs[count - 1] && objs[count - 1]->type == ESYNC_QUEUE)
msgwait = TRUE;
if (has_esync && has_server)
@@ -890,7 +897,7 @@ static NTSTATUS __esync_wait_objects( DWORD count, const HANDLE *handles, BOOLEA
}
}
- if (wait_any || count == 1)
+ if (wait_any || count <= 1)
{
/* Try to check objects now, so we can obviate poll() at least. */
for (i = 0; i < count; i++)
diff --git a/dlls/ntdll/unix/loader.c b/dlls/ntdll/unix/loader.c
index d8f289054d4..67485a863f5 100644
--- a/dlls/ntdll/unix/loader.c
+++ b/dlls/ntdll/unix/loader.c
@@ -91,6 +91,7 @@
#include "winternl.h"
#include "unix_private.h"
#include "esync.h"
+#include "msync.h"
#include "wine/list.h"
#include "ntsyscalls.h"
#include "wine/debug.h"
@@ -1859,6 +1860,7 @@ static void start_main_thread(void)
signal_alloc_thread( teb );
dbg_init();
startup_info_size = server_init_process();
+ msync_init();
esync_init();
virtual_map_user_shared_data();
init_cpu_info();
diff --git a/dlls/ntdll/unix/msync.c b/dlls/ntdll/unix/msync.c
new file mode 100644
index 00000000000..2eef30dd0f2
--- /dev/null
+++ b/dlls/ntdll/unix/msync.c
@@ -0,0 +1,1689 @@
+/*
+ * mach semaphore-based synchronization objects
+ *
+ * Copyright (C) 2018 Zebediah Figura
+ * Copyright (C) 2023 Marc-Aurel Zent
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#if 0
+#pragma makedep unix
+#endif
+
+#include "config.h"
+
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/mman.h>
+#ifdef HAVE_SYS_STAT_H
+# include <sys/stat.h>
+#endif
+#ifdef HAVE_SYS_SYSCALL_H
+# include <sys/syscall.h>
+#endif
+#ifdef __APPLE__
+# include <mach/mach_init.h>
+# include <mach/mach_port.h>
+# include <mach/message.h>
+# include <mach/port.h>
+# include <mach/task.h>
+# include <mach/semaphore.h>
+# include <mach/mach_error.h>
+# include <servers/bootstrap.h>
+# include <os/lock.h>
+#endif
+#include <dlfcn.h>
+#include <sched.h>
+#include <unistd.h>
+
+#include "ntstatus.h"
+#define WIN32_NO_STATUS
+#include "windef.h"
+#include "winternl.h"
+#include "wine/debug.h"
+#include "wine/server.h"
+
+#include "unix_private.h"
+#include "msync.h"
+
+WINE_DEFAULT_DEBUG_CHANNEL(msync);
+
+static LONGLONG update_timeout( ULONGLONG end )
+{
+ LARGE_INTEGER now;
+ LONGLONG timeleft;
+
+ NtQuerySystemTime( &now );
+ timeleft = end - now.QuadPart;
+ if (timeleft < 0) timeleft = 0;
+ return timeleft;
+}
+
+static inline mach_timespec_t convert_to_mach_time( LONGLONG win32_time )
+{
+ mach_timespec_t ret;
+
+ ret.tv_sec = win32_time / (ULONGLONG)TICKSPERSEC;
+ ret.tv_nsec = (win32_time % TICKSPERSEC) * 100;
+ return ret;
+}
+
+#define UL_COMPARE_AND_WAIT_SHARED 0x3
+#define ULF_WAKE_ALL 0x00000100
+#define ULF_NO_ERRNO 0x01000000
+extern int __ulock_wake( uint32_t operation, void *addr, uint64_t wake_value );
+
+typedef int (*__ulock_wait2_ptr_t)( uint32_t operation, void *addr, uint64_t value,
+ uint64_t timeout_ns, uint64_t value2 );
+static __ulock_wait2_ptr_t __ulock_wait2;
+
+/*
+ * Faster to directly do the syscall and inline everything, taken and slightly adapted
+ * from xnu/libsyscall/mach/mach_msg.c
+ */
+
+#define LIBMACH_OPTIONS64 (MACH_SEND_INTERRUPT|MACH_RCV_INTERRUPT)
+#define MACH64_SEND_MQ_CALL 0x0000000400000000ull
+
+typedef mach_msg_return_t (*mach_msg2_trap_ptr_t)( void *data, uint64_t options,
+ uint64_t msgh_bits_and_send_size, uint64_t msgh_remote_and_local_port,
+ uint64_t msgh_voucher_and_id, uint64_t desc_count_and_rcv_name,
+ uint64_t rcv_size_and_priority, uint64_t timeout );
+
+static mach_msg2_trap_ptr_t mach_msg2_trap;
+
+static inline mach_msg_return_t mach_msg2_internal( void *data, uint64_t option64, uint64_t msgh_bits_and_send_size,
+ uint64_t msgh_remote_and_local_port, uint64_t msgh_voucher_and_id, uint64_t desc_count_and_rcv_name,
+ uint64_t rcv_size_and_priority, uint64_t timeout)
+{
+ mach_msg_return_t mr;
+
+ mr = mach_msg2_trap( data, option64 & ~LIBMACH_OPTIONS64, msgh_bits_and_send_size,
+ msgh_remote_and_local_port, msgh_voucher_and_id, desc_count_and_rcv_name,
+ rcv_size_and_priority, timeout );
+
+ if (mr == MACH_MSG_SUCCESS)
+ return MACH_MSG_SUCCESS;
+
+ while (mr == MACH_SEND_INTERRUPTED)
+ mr = mach_msg2_trap( data, option64 & ~LIBMACH_OPTIONS64, msgh_bits_and_send_size,
+ msgh_remote_and_local_port, msgh_voucher_and_id, desc_count_and_rcv_name,
+ rcv_size_and_priority, timeout );
+
+ while (mr == MACH_RCV_INTERRUPTED)
+ mr = mach_msg2_trap( data, option64 & ~LIBMACH_OPTIONS64, msgh_bits_and_send_size & 0xffffffffull,
+ msgh_remote_and_local_port, msgh_voucher_and_id, desc_count_and_rcv_name,
+ rcv_size_and_priority, timeout);
+
+ return mr;
+}
+
+/* For older versions of macOS we need to provide fallback in case there is no mach_msg2... */
+extern mach_msg_return_t mach_msg_trap( mach_msg_header_t *msg, mach_msg_option_t option,
+ mach_msg_size_t send_size, mach_msg_size_t rcv_size, mach_port_name_t rcv_name, mach_msg_timeout_t timeout,
+ mach_port_name_t notify );
+
+static inline mach_msg_return_t mach_msg2( mach_msg_header_t *data, uint64_t option64,
+ mach_msg_size_t send_size, mach_msg_size_t rcv_size, mach_port_t rcv_name, uint64_t timeout,
+ uint32_t priority)
+{
+ mach_msg_base_t *base;
+ mach_msg_size_t descriptors;
+
+ if (!mach_msg2_trap)
+ return mach_msg_trap( data, (mach_msg_option_t)option64, send_size,
+ rcv_size, rcv_name, timeout, priority );
+
+ base = (mach_msg_base_t *)data;
+
+ if ((option64 & MACH_SEND_MSG) &&
+ (base->header.msgh_bits & MACH_MSGH_BITS_COMPLEX))
+ descriptors = base->body.msgh_descriptor_count;
+ else
+ descriptors = 0;
+
+#define MACH_MSG2_SHIFT_ARGS(lo, hi) ((uint64_t)hi << 32 | (uint32_t)lo)
+ return mach_msg2_internal(data, option64 | MACH64_SEND_MQ_CALL,
+ MACH_MSG2_SHIFT_ARGS(data->msgh_bits, send_size),
+ MACH_MSG2_SHIFT_ARGS(data->msgh_remote_port, data->msgh_local_port),
+ MACH_MSG2_SHIFT_ARGS(data->msgh_voucher_port, data->msgh_id),
+ MACH_MSG2_SHIFT_ARGS(descriptors, rcv_name),
+ MACH_MSG2_SHIFT_ARGS(rcv_size, priority), timeout);
+#undef MACH_MSG2_SHIFT_ARGS
+}
+
+/* this is a lot, but running out cripples performance */
+#define MAX_POOL_SEMAPHORES 1024
+#define POOL_SHRINK_THRESHOLD 30
+#define POOL_SHRINK_COUNT 10
+
+struct semaphore_memory_pool
+{
+ semaphore_t semaphores[MAX_POOL_SEMAPHORES];
+ semaphore_t *free_semaphores[MAX_POOL_SEMAPHORES];
+ unsigned int count;
+ unsigned int total;
+ os_unfair_lock lock;
+};
+
+static struct semaphore_memory_pool *pool;
+
+static void semaphore_pool_init(void)
+{
+ unsigned int i;
+
+ pool = malloc( sizeof(struct semaphore_memory_pool) );
+
+ pool->lock = OS_UNFAIR_LOCK_INIT;
+
+ for (i = 0; i < MAX_POOL_SEMAPHORES; i++)
+ {
+ pool->free_semaphores[i] = &pool->semaphores[i];
+ }
+
+ pool->count = 0;
+ pool->total = 0;
+}
+
+static inline semaphore_t *semaphore_pool_alloc(void)
+{
+ semaphore_t *new_semaphore;
+ kern_return_t kr;
+
+ os_unfair_lock_lock(&pool->lock);
+
+ if (pool->count == 0)
+ {
+ if (pool->total < MAX_POOL_SEMAPHORES)
+ {
+ TRACE("Dynamically growing semaphore pool\n");
+ kr = semaphore_create(mach_task_self(), &pool->semaphores[pool->total], SYNC_POLICY_FIFO, 0);
+ if (kr != KERN_SUCCESS)
+ ERR("Cannot create dynamic semaphore: %#x %s\n", kr, mach_error_string(kr));
+
+ new_semaphore = &pool->semaphores[pool->total];
+ pool->total++;
+
+ os_unfair_lock_unlock(&pool->lock);
+
+ return new_semaphore;
+ }
+ else
+ {
+ os_unfair_lock_unlock(&pool->lock);
+
+ WARN("Semaphore pool exhausted, consider increasing MAX_POOL_SEMAPHORES\n");
+ new_semaphore = malloc(sizeof(semaphore_t));
+ kr = semaphore_create(mach_task_self(), new_semaphore, SYNC_POLICY_FIFO, 0);
+ if (kr != KERN_SUCCESS)
+ ERR("Cannot create dynamic semaphore: %#x %s\n", kr, mach_error_string(kr));
+
+ return new_semaphore;
+ }
+ }
+
+ new_semaphore = pool->free_semaphores[pool->count - 1];
+ pool->count--;
+
+ os_unfair_lock_unlock(&pool->lock);
+
+ return new_semaphore;
+}
+
+static inline void semaphore_pool_free(semaphore_t *sem)
+{
+ int i;
+
+ os_unfair_lock_lock(&pool->lock);
+
+ if (sem < pool->semaphores || sem >= pool->semaphores + MAX_POOL_SEMAPHORES)
+ {
+ os_unfair_lock_unlock(&pool->lock);
+
+ semaphore_destroy(mach_task_self(), *sem);
+ free(sem);
+
+ return;
+ }
+
+ if (pool->count >= POOL_SHRINK_THRESHOLD)
+ {
+ TRACE("Dynamically shrinking semaphore pool\n");
+ for (i = 0; i < POOL_SHRINK_COUNT; i++)
+ {
+ semaphore_destroy(mach_task_self(), *sem);
+ pool->total--;
+ }
+ }
+ else
+ {
+ pool->free_semaphores[pool->count] = sem;
+ pool->count++;
+ }
+
+ os_unfair_lock_unlock(&pool->lock);
+}
+
+struct msync
+{
+ void *shm; /* pointer to shm section */
+ enum msync_type type;
+ unsigned int shm_idx;
+};
+
+typedef struct
+{
+ mach_msg_header_t header;
+ mach_msg_body_t body;
+ mach_msg_port_descriptor_t descriptor;
+} mach_register_message_prolog_t;
+
+typedef struct
+{
+ mach_register_message_prolog_t prolog;
+ unsigned int shm_idx[MAXIMUM_WAIT_OBJECTS + 1];
+} mach_register_message_t;
+
+typedef struct
+{
+ mach_msg_header_t header;
+ unsigned int shm_idx[MAXIMUM_WAIT_OBJECTS + 1];
+} mach_unregister_message_t;
+
+static mach_port_t server_port;
+
+static const mach_msg_bits_t msgh_bits_complex_send = MACH_MSGH_BITS_SET(
+ MACH_MSG_TYPE_COPY_SEND, 0, 0, MACH_MSGH_BITS_COMPLEX);
+
+static const mach_msg_bits_t msgh_bits_send = MACH_MSGH_BITS_REMOTE(MACH_MSG_TYPE_COPY_SEND);
+
+static inline mach_msg_return_t server_register_wait( semaphore_t sem, unsigned int msgh_id,
+ struct msync **wait_objs, const int count )
+{
+ int i, is_mutex;
+ mach_msg_return_t mr;
+ __thread static mach_register_message_t message;
+
+ message.prolog.header.msgh_remote_port = server_port;
+ message.prolog.header.msgh_bits = msgh_bits_complex_send;
+ message.prolog.header.msgh_id = msgh_id;
+
+ message.prolog.body.msgh_descriptor_count = 1;
+
+ message.prolog.descriptor.name = sem;
+ message.prolog.descriptor.disposition = MACH_MSG_TYPE_COPY_SEND;
+ message.prolog.descriptor.type = MACH_MSG_PORT_DESCRIPTOR;
+
+ for (i = 0; i < count; i++)
+ {
+ is_mutex = wait_objs[i]->type == MSYNC_MUTEX ? 1 : 0;
+ message.shm_idx[i] = wait_objs[i]->shm_idx | (is_mutex << 28);
+ __atomic_add_fetch( (int *)(wait_objs[i]->shm) + 3, 1, __ATOMIC_SEQ_CST);
+ }
+
+ message.prolog.header.msgh_size = sizeof(mach_register_message_prolog_t) +
+ count * sizeof(unsigned int);
+
+ mr = mach_msg2( (mach_msg_header_t *)&message, MACH_SEND_MSG, message.prolog.header.msgh_size,
+ 0, MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, 0 );
+
+ if (mr != MACH_MSG_SUCCESS)
+ ERR("Failed to send server register wait: %#x\n", mr);
+
+ return mr;
+}
+
+static inline void server_remove_wait( unsigned int msgh_id, struct msync **wait_objs, const int count )
+{
+ int i;
+ mach_msg_return_t mr;
+ __thread static mach_unregister_message_t message;
+
+ message.header.msgh_remote_port = server_port;
+ message.header.msgh_bits = msgh_bits_send;
+ message.header.msgh_id = msgh_id;
+
+ for (i = 0; i < count; i++)
+ {
+ int old_val, new_val;
+ do
+ {
+ old_val = __atomic_load_n( (int *)(wait_objs[i]->shm) + 3, __ATOMIC_SEQ_CST );
+ if (old_val <= 0) break;
+ new_val = old_val - 1;
+ } while (!__atomic_compare_exchange_n( (int *)(wait_objs[i]->shm) + 3, &old_val,
+ new_val, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST ));
+
+ message.shm_idx[i] = wait_objs[i]->shm_idx;
+ }
+
+ message.header.msgh_size = sizeof(mach_msg_header_t) +
+ count * sizeof(unsigned int);
+
+ mr = mach_msg2( (mach_msg_header_t *)&message, MACH_SEND_MSG, message.header.msgh_size,
+ 0, MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, 0 );
+
+ if (mr != MACH_MSG_SUCCESS)
+ ERR("Failed to send server remove wait: %#x\n", mr);
+}
+
+static NTSTATUS destroyed_wait( ULONGLONG *end )
+{
+ if (end)
+ {
+ usleep( update_timeout( *end ) / 10 );
+ return STATUS_TIMEOUT;
+ }
+ pause();
+ return STATUS_PENDING;
+}
+
+static inline int is_destroyed( struct msync **objs, int count)
+{
+ int i;
+
+ for (i = 0; i < count; i++)
+ if (__atomic_load_n( (int *)objs[i]->shm + 2, __ATOMIC_RELAXED ))
+ return 0;
+
+ return 1;
+}
+
+static inline NTSTATUS msync_wait_single( struct msync *wait_obj,
+ ULONGLONG *end, int tid )
+{
+ int ret, val = 0;
+ void *addr = wait_obj->shm;
+ ULONGLONG ns_timeleft = 0;
+
+ do
+ {
+ if (wait_obj->type == MSYNC_MUTEX)
+ {
+ val = __atomic_load_n( (int *)addr, __ATOMIC_ACQUIRE );
+ if (!val || val == ~0)
+ val = tid;
+ }
+
+ if (__atomic_load_n( (int *)addr, __ATOMIC_ACQUIRE ) != val)
+ return STATUS_PENDING;
+
+ if (end)
+ {
+ ns_timeleft = update_timeout( *end ) * 100;
+ if (!ns_timeleft) return STATUS_TIMEOUT;
+ }
+ ret = __ulock_wait2( UL_COMPARE_AND_WAIT_SHARED | ULF_NO_ERRNO, addr, val, ns_timeleft, 0 );
+ } while (ret == -EINTR);
+
+ if (ret == -ETIMEDOUT)
+ return STATUS_TIMEOUT;
+
+ if (is_destroyed( &wait_obj, 1 ))
+ return destroyed_wait( end );
+
+ return STATUS_SUCCESS;
+}
+
+static inline int resize_wait_objs( struct msync **wait_objs, struct msync **objs, int count )
+{
+ int read_index, write_index = 0;
+
+ for (read_index = 0; read_index < count; read_index++)
+ {
+ if (wait_objs[read_index] &&
+ __atomic_load_n( (int *)wait_objs[read_index]->shm + 2, __ATOMIC_RELAXED ))
+ {
+ objs[write_index] = wait_objs[read_index];
+ write_index++;
+ }
+ }
+
+ return write_index;
+}
+
+static inline int check_shm_contention( struct msync **wait_objs,
+ int count, int tid )
+{
+ int i, val;
+
+ for (i = 0; i < count; i++)
+ {
+ val = __atomic_load_n((int *)wait_objs[i]->shm, __ATOMIC_SEQ_CST);
+ if (wait_objs[i]->type == MSYNC_MUTEX)
+ {
+ if (val == 0 || val == ~0 || val == tid) return 1;
+ }
+ else
+ {
+ if (val != 0) return 1;
+ }
+ }
+ return 0;
+}
+
+static NTSTATUS msync_wait_multiple( struct msync **wait_objs,
+ int count, ULONGLONG *end, int tid )
+{
+ semaphore_t *sem;
+ kern_return_t kr;
+ mach_msg_return_t mr;
+ unsigned int msgh_id;
+ __thread static struct msync *objs[MAXIMUM_WAIT_OBJECTS + 1];
+
+ count = resize_wait_objs( wait_objs, objs, count );
+
+ if (count == 1 && __ulock_wait2) return msync_wait_single( objs[0], end, tid );
+ if (!count) return destroyed_wait( end );
+
+ if (check_shm_contention( objs, count, tid ))
+ return STATUS_PENDING;
+
+ sem = semaphore_pool_alloc();
+ msgh_id = (tid << 8) | count;
+ mr = server_register_wait( *sem, msgh_id, objs, count );
+
+ if (mr != MACH_MSG_SUCCESS)
+ {
+ /* The os failed to send the mach message, which is either because
+ * we lost the wineserver process or the semaphore from semaphore_pool_alloc
+ * is not valid...
+ * To avoid pooling in a dead port, recreate it here.
+ * Worst case, this will behave effectively like a spinlock. */
+ semaphore_destroy( mach_task_self(), *sem) ;
+ kr = semaphore_create( mach_task_self(), sem, SYNC_POLICY_FIFO, 0 );
+
+ if (kr != KERN_SUCCESS)
+ {
+ ERR("Cannot create semaphore: %#x %s\n", kr, mach_error_string(kr));
+ semaphore_pool_free( sem );
+ return STATUS_PENDING;
+ }
+
+ mr = server_register_wait( *sem, msgh_id, objs, count );
+
+ if (mr != MACH_MSG_SUCCESS)
+ {
+ semaphore_pool_free( sem );
+ return STATUS_PENDING;
+ }
+ }
+
+ do
+ {
+ if (end)
+ kr = semaphore_timedwait( *sem,
+ convert_to_mach_time( update_timeout( *end ) ) );
+ else
+ kr = semaphore_wait( *sem );
+ } while (kr == KERN_ABORTED);
+
+ semaphore_pool_free( sem );
+
+ if (is_destroyed( objs, count ))
+ return destroyed_wait( end );
+
+ server_remove_wait( msgh_id, objs, count );
+
+ switch (kr) {
+ case KERN_SUCCESS:
+ return STATUS_SUCCESS;
+ case KERN_OPERATION_TIMED_OUT:
+ if (check_shm_contention( objs, count, tid ))
+ return STATUS_PENDING;
+ return STATUS_TIMEOUT;
+ case KERN_TERMINATED:
+ return destroyed_wait( end );
+ default:
+ ERR("Unexpected kernel return code: %#x %s\n", kr, mach_error_string( kr ));
+ return STATUS_PENDING;
+ }
+}
+
+int do_msync(void)
+{
+#ifdef __APPLE__
+ static int do_msync_cached = -1;
+
+ if (do_msync_cached == -1)
+ do_msync_cached = getenv("WINEMSYNC") && atoi(getenv("WINEMSYNC"));
+
+ return do_msync_cached;
+#else
+ static int once;
+ if (!once++)
+ FIXME("mach semaphores not supported on this platform.\n");
+ return 0;
+#endif
+}
+
+struct semaphore
+{
+ int count;
+ int max;
+};
+C_ASSERT(sizeof(struct semaphore) == 8);
+
+struct event
+{
+ int signaled;
+ int unused;
+};
+C_ASSERT(sizeof(struct event) == 8);
+
+struct mutex
+{
+ int tid;
+ int count; /* recursion count */
+};
+C_ASSERT(sizeof(struct mutex) == 8);
+
+static char shm_name[29];
+static int shm_fd;
+static void **shm_addrs;
+static int shm_addrs_size; /* length of the allocated shm_addrs array */
+static long pagesize;
+
+static os_unfair_lock shm_addrs_lock = OS_UNFAIR_LOCK_INIT;
+
+static void *get_shm( unsigned int idx )
+{
+ int entry = (idx * 16) / pagesize;
+ int offset = (idx * 16) % pagesize;
+ void *ret;
+
+ os_unfair_lock_lock( &shm_addrs_lock );
+
+ if (entry >= shm_addrs_size)
+ {
+ int new_size = max(shm_addrs_size * 2, entry + 1);
+
+ if (!(shm_addrs = realloc( shm_addrs, new_size * sizeof(shm_addrs[0]) )))
+ ERR("Failed to grow shm_addrs array to size %d.\n", shm_addrs_size);
+ memset( shm_addrs + shm_addrs_size, 0, (new_size - shm_addrs_size) * sizeof(shm_addrs[0]) );
+ shm_addrs_size = new_size;
+ }
+
+ if (!shm_addrs[entry])
+ {
+ void *addr = mmap( NULL, pagesize, PROT_READ | PROT_WRITE, MAP_SHARED, shm_fd, entry * pagesize );
+ if (addr == (void *)-1)
+ ERR("Failed to map page %d (offset %#lx).\n", entry, entry * pagesize);
+
+ TRACE("Mapping page %d at %p.\n", entry, addr);
+
+ if (__sync_val_compare_and_swap( &shm_addrs[entry], 0, addr ))
+ munmap( addr, pagesize ); /* someone beat us to it */
+ }
+
+ ret = (void *)((unsigned long)shm_addrs[entry] + offset);
+
+ os_unfair_lock_unlock( &shm_addrs_lock );
+
+ return ret;
+}
+
+/* We'd like lookup to be fast. To that end, we use a static list indexed by handle.
+ * This is copied and adapted from the fd cache code. */
+
+#define MSYNC_LIST_BLOCK_SIZE (65536 / sizeof(struct msync))
+#define MSYNC_LIST_ENTRIES 256
+
+static struct msync *msync_list[MSYNC_LIST_ENTRIES];
+static struct msync msync_list_initial_block[MSYNC_LIST_BLOCK_SIZE];
+
+static inline UINT_PTR handle_to_index( HANDLE handle, UINT_PTR *entry )
+{
+ UINT_PTR idx = (((UINT_PTR)handle) >> 2) - 1;
+ *entry = idx / MSYNC_LIST_BLOCK_SIZE;
+ return idx % MSYNC_LIST_BLOCK_SIZE;
+}
+
+static struct msync *add_to_list( HANDLE handle, enum msync_type type, unsigned int shm_idx )
+{
+ UINT_PTR entry, idx = handle_to_index( handle, &entry );
+ void *shm = get_shm( shm_idx );
+
+ if (entry >= MSYNC_LIST_ENTRIES)
+ {
+ FIXME( "too many allocated handles, not caching %p\n", handle );
+ return FALSE;
+ }
+
+ if (!msync_list[entry]) /* do we need to allocate a new block of entries? */
+ {
+ if (!entry) msync_list[0] = msync_list_initial_block;
+ else
+ {
+ void *ptr = anon_mmap_alloc( MSYNC_LIST_BLOCK_SIZE * sizeof(struct msync),
+ PROT_READ | PROT_WRITE );
+ if (ptr == MAP_FAILED) return FALSE;
+ msync_list[entry] = ptr;
+ }
+ }
+
+ if (!__sync_val_compare_and_swap((int *)&msync_list[entry][idx].type, 0, type ))
+ {
+ msync_list[entry][idx].shm = shm;
+ msync_list[entry][idx].shm_idx = shm_idx;
+ }
+
+ return &msync_list[entry][idx];
+}
+
+static struct msync *get_cached_object( HANDLE handle )
+{
+ UINT_PTR entry, idx = handle_to_index( handle, &entry );
+
+ if (entry >= MSYNC_LIST_ENTRIES || !msync_list[entry]) return NULL;
+ if (!msync_list[entry][idx].type) return NULL;
+
+ return &msync_list[entry][idx];
+}
+
+/* Gets an object. This is either a proper msync object (i.e. an event,
+ * semaphore, etc. created using create_msync) or a generic synchronizable
+ * server-side object which the server will signal (e.g. a process, thread,
+ * message queue, etc.) */
+static NTSTATUS get_object( HANDLE handle, struct msync **obj )
+{
+ NTSTATUS ret = STATUS_SUCCESS;
+ unsigned int shm_idx = 0;
+ enum msync_type type;
+
+ if ((*obj = get_cached_object( handle ))) return STATUS_SUCCESS;
+
+ if ((INT_PTR)handle < 0)
+ {
+ /* We can deal with pseudo-handles, but it's just easier this way */
+ return STATUS_NOT_IMPLEMENTED;
+ }
+
+ /* We need to try grabbing it from the server. */
+ SERVER_START_REQ( get_msync_idx )
+ {
+ req->handle = wine_server_obj_handle( handle );
+ if (!(ret = wine_server_call( req )))
+ {
+ shm_idx = reply->shm_idx;
+ type = reply->type;
+ }
+ }
+ SERVER_END_REQ;
+
+ if (ret)
+ {
+ WARN("Failed to retrieve shm index for handle %p, status %#x.\n", handle, ret);
+ *obj = NULL;
+ return ret;
+ }
+
+ TRACE("Got shm index %d for handle %p.\n", shm_idx, handle);
+ *obj = add_to_list( handle, type, shm_idx );
+ return ret;
+}
+
+NTSTATUS msync_close( HANDLE handle )
+{
+ UINT_PTR entry, idx = handle_to_index( handle, &entry );
+
+ TRACE("%p.\n", handle);
+
+ if (entry < MSYNC_LIST_ENTRIES && msync_list[entry])
+ {
+ if (__atomic_exchange_n( &msync_list[entry][idx].type, 0, __ATOMIC_SEQ_CST ))
+ return STATUS_SUCCESS;
+ }
+
+ return STATUS_INVALID_HANDLE;
+}
+
+static NTSTATUS create_msync( enum msync_type type, HANDLE *handle,
+ ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr, int low, int high )
+{
+ NTSTATUS ret;
+ data_size_t len;
+ struct object_attributes *objattr;
+ unsigned int shm_idx;
+
+ if ((ret = alloc_object_attributes( attr, &objattr, &len ))) return ret;
+
+ SERVER_START_REQ( create_msync )
+ {
+ req->access = access;
+ req->low = low;
+ req->high = high;
+ req->type = type;
+ wine_server_add_data( req, objattr, len );
+ ret = wine_server_call( req );
+ if (!ret || ret == STATUS_OBJECT_NAME_EXISTS)
+ {
+ *handle = wine_server_ptr_handle( reply->handle );
+ shm_idx = reply->shm_idx;
+ type = reply->type;
+ }
+ }
+ SERVER_END_REQ;
+
+ if (!ret || ret == STATUS_OBJECT_NAME_EXISTS)
+ {
+ add_to_list( *handle, type, shm_idx );
+ TRACE("-> handle %p, shm index %d.\n", *handle, shm_idx);
+ }
+
+ free( objattr );
+ return ret;
+}
+
+static NTSTATUS open_msync( enum msync_type type, HANDLE *handle,
+ ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr )
+{
+ NTSTATUS ret;
+ unsigned int shm_idx;
+
+ SERVER_START_REQ( open_msync )
+ {
+ req->access = access;
+ req->attributes = attr->Attributes;
+ req->rootdir = wine_server_obj_handle( attr->RootDirectory );
+ req->type = type;
+ if (attr->ObjectName)
+ wine_server_add_data( req, attr->ObjectName->Buffer, attr->ObjectName->Length );
+ if (!(ret = wine_server_call( req )))
+ {
+ *handle = wine_server_ptr_handle( reply->handle );
+ type = reply->type;
+ shm_idx = reply->shm_idx;
+ }
+ }
+ SERVER_END_REQ;
+
+ if (!ret)
+ {
+ add_to_list( *handle, type, shm_idx );
+ TRACE("-> handle %p, shm index %u.\n", *handle, shm_idx);
+ }
+ return ret;
+}
+
+void msync_init(void)
+{
+ struct stat st;
+ mach_port_t bootstrap_port;
+ void *dlhandle = dlopen( NULL, RTLD_NOW );
+
+ if (!do_msync())
+ {
+ /* make sure the server isn't running with WINEMSYNC */
+ HANDLE handle;
+ NTSTATUS ret;