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CFRunLoop.c
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/*
* Copyright (c) 2008-2012 Brent Fulgham <bfulgham@gmail.org>. All rights reserved.
* Copyright (c) 2009 Grant Erickson <gerickson@nuovations.com>. All rights reserved.
*
* This source code is a modified version of the CoreFoundation sources released by Apple Inc. under
* the terms of the APSL version 2.0 (see below).
*
* For information about changes from the original Apple source release can be found by reviewing the
* source control system for the project at https://sourceforge.net/svn/?group_id=246198.
*
* The original license information is as follows:
*
* Copyright (c) 2011 Apple Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this
* file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
/* CFRunLoop.c
Copyright (c) 1998-2011, Apple Inc. All rights reserved.
Responsibility: Tony Parker
*/
#include <CoreFoundation/CFRunLoop.h>
#include <CoreFoundation/CFSet.h>
#include <CoreFoundation/CFBag.h>
#include <CoreFoundation/CoreFoundation_Prefix.h>
#include "CFInternal.h"
#include <math.h>
#include <stdio.h>
#include <limits.h>
#include <pthread.h>
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED
#include <dispatch/dispatch.h>
#include <CoreFoundation/CFUserNotification.h>
#include <mach/mach.h>
#include <mach/clock_types.h>
#include <mach/clock.h>
#include <unistd.h>
#include <dlfcn.h>
extern mach_port_t _dispatch_get_main_queue_port_4CF(void);
extern void _dispatch_main_queue_callback_4CF(mach_msg_header_t *msg);
#elif DEPLOYMENT_TARGET_WINDOWS
#include <process.h>
__private_extern__ LONGLONG __CFTSRToFiletime(int64_t tsr);
#if __DISPATCH__
DISPATCH_EXPORT HANDLE _dispatch_get_main_queue_handle_4CF(void);
DISPATCH_EXPORT void _dispatch_main_queue_callback_4CF(void);
#else
HANDLE _dispatch_get_main_queue_handle_4CF(void) { return 0; }
void _dispatch_main_queue_callback_4CF(void) {}
typedef void* dispatch_source_t ;
#endif
#define getpid _getpid
#define read _read
#elif DEPLOYMENT_TARGET_LINUX
#include <dlfcn.h>
#include <pthread.h>
#include <semaphore.h>
typedef void* dispatch_source_t ;
#endif
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED
#include <Block.h>
#define __DISPATCH__ 1
#else
#undef __BLOCKS__
#define Block_release(a)
#endif
static int _LogCFRunLoop = 0;
// for conservative arithmetic safety, such that (TIMER_DATE_LIMIT + TIMER_INTERVAL_LIMIT + kCFAbsoluteTimeIntervalSince1970) * 10^9 < 2^63
#define TIMER_DATE_LIMIT 4039289856.0
#define TIMER_INTERVAL_LIMIT 504911232.0
#define HANDLE_DISPATCH_ON_BASE_INVOCATION_ONLY 0
#if DEPLOYMENT_TARGET_WINDOWS
static pthread_t kNilPthreadT = { nil, nil };
#define pthreadPointer(a) a.p
#else
static pthread_t kNilPthreadT = (pthread_t)0;
#define pthreadPointer(a) a
#define lockCount(a) a
#endif
CF_EXPORT bool CFDictionaryGetKeyIfPresent(CFDictionaryRef dict, const void *key, const void **actualkey);
// In order to reuse most of the code across Mach and Windows v1 RunLoopSources, we define a
// simple abstraction layer spanning Mach ports and Windows HANDLES
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED
__private_extern__ uint32_t __CFGetProcessPortCount(void) {
ipc_info_space_t info;
ipc_info_name_array_t table = 0;
mach_msg_type_number_t tableCount = 0;
ipc_info_tree_name_array_t tree = 0;
mach_msg_type_number_t treeCount = 0;
kern_return_t ret = mach_port_space_info(mach_task_self(), &info, &table, &tableCount, &tree, &treeCount);
if (ret != KERN_SUCCESS) {
return (uint32_t)0;
}
if (table != NULL) {
ret = vm_deallocate(mach_task_self(), (vm_address_t)table, tableCount * sizeof(*table));
}
if (tree != NULL) {
ret = vm_deallocate(mach_task_self(), (vm_address_t)tree, treeCount * sizeof(*tree));
}
return (uint32_t)tableCount;
}
__private_extern__ CFArrayRef __CFStopAllThreads(void) {
CFMutableArrayRef suspended_list = CFArrayCreateMutable(kCFAllocatorSystemDefault, 0, NULL);
mach_port_t my_task = mach_task_self();
mach_port_t my_thread = mach_thread_self();
thread_act_array_t thr_list = 0;
mach_msg_type_number_t thr_cnt = 0;
// really, should loop doing the stopping until no more threads get added to the list N times in a row
kern_return_t ret = task_threads(my_task, &thr_list, &thr_cnt);
if (ret == KERN_SUCCESS) {
for (CFIndex idx = 0; idx < thr_cnt; idx++) {
thread_act_t thread = thr_list[idx];
if (thread == my_thread) continue;
if (CFArrayContainsValue(suspended_list, CFRangeMake(0, CFArrayGetCount(suspended_list)), (const void *)(uintptr_t)thread)) continue;
ret = thread_suspend(thread);
if (ret == KERN_SUCCESS) {
CFArrayAppendValue(suspended_list, (const void *)(uintptr_t)thread);
} else {
mach_port_deallocate(my_task, thread);
}
}
vm_deallocate(my_task, (vm_address_t)thr_list, sizeof(thread_t) * thr_cnt);
}
mach_port_deallocate(my_task, my_thread);
return suspended_list;
}
__private_extern__ void __CFRestartAllThreads(CFArrayRef threads) {
for (CFIndex idx = 0; idx < CFArrayGetCount(threads); idx++) {
thread_act_t thread = (thread_act_t)(uintptr_t)CFArrayGetValueAtIndex(threads, idx);
kern_return_t ret = thread_resume(thread);
if (ret != KERN_SUCCESS) HALT;
mach_port_deallocate(mach_task_self(), thread);
}
}
static uint32_t __CF_last_warned_port_count = 0;
static void foo() __attribute__((unused));
static void foo() {
uint32_t pcnt = __CFGetProcessPortCount();
if (__CF_last_warned_port_count + 1000 < pcnt) {
CFArrayRef threads = __CFStopAllThreads();
// do stuff here
CFOptionFlags responseFlags = 0;
SInt32 result = CFUserNotificationDisplayAlert(0.0, kCFUserNotificationCautionAlertLevel, NULL, NULL, NULL, CFSTR("High Mach Port Usage"), CFSTR("This application is using a lot of Mach ports."), CFSTR("Default"), CFSTR("Altern"), CFSTR("Other b"), &responseFlags);
if (0 != result) {
CFLog(3, CFSTR("ERROR"));
} else {
switch (responseFlags) {
case kCFUserNotificationDefaultResponse: CFLog(3, CFSTR("DefaultR")); break;
case kCFUserNotificationAlternateResponse: CFLog(3, CFSTR("AltR")); break;
case kCFUserNotificationOtherResponse: CFLog(3, CFSTR("OtherR")); break;
case kCFUserNotificationCancelResponse: CFLog(3, CFSTR("CancelR")); break;
}
}
__CFRestartAllThreads(threads);
CFRelease(threads);
__CF_last_warned_port_count = pcnt;
}
}
typedef mach_port_t __CFPort;
#define CFPORT_NULL MACH_PORT_NULL
typedef mach_port_t __CFPortSet;
static void __THE_SYSTEM_HAS_NO_PORTS_AVAILABLE__(kern_return_t ret) __attribute__((noinline));
static void __THE_SYSTEM_HAS_NO_PORTS_AVAILABLE__(kern_return_t ret) { HALT; };
static __CFPort __CFPortAllocate(void) {
__CFPort result = CFPORT_NULL;
kern_return_t ret;
ret = mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, &result);
if (KERN_SUCCESS == ret) {
ret = mach_port_insert_right(mach_task_self(), result, result, MACH_MSG_TYPE_MAKE_SEND);
} else {
__THE_SYSTEM_HAS_NO_PORTS_AVAILABLE__(ret);
}
if (KERN_SUCCESS == ret) {
mach_port_limits_t limits;
limits.mpl_qlimit = 1;
ret = mach_port_set_attributes(mach_task_self(), result, MACH_PORT_LIMITS_INFO, (mach_port_info_t)&limits, MACH_PORT_LIMITS_INFO_COUNT);
}
if (KERN_SUCCESS != ret) mach_port_destroy(mach_task_self(), result);
return (KERN_SUCCESS == ret) ? result : CFPORT_NULL;
}
CF_INLINE void __CFPortFree(__CFPort port) {
mach_port_destroy(mach_task_self(), port);
}
static void __THE_SYSTEM_HAS_NO_PORT_SETS_AVAILABLE__(kern_return_t ret) __attribute__((noinline));
static void __THE_SYSTEM_HAS_NO_PORT_SETS_AVAILABLE__(kern_return_t ret) { HALT; };
CF_INLINE __CFPortSet __CFPortSetAllocate(void) {
__CFPortSet result;
kern_return_t ret = mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_PORT_SET, &result);
if (KERN_SUCCESS != ret) { __THE_SYSTEM_HAS_NO_PORT_SETS_AVAILABLE__(ret); }
return (KERN_SUCCESS == ret) ? result : CFPORT_NULL;
}
CF_INLINE Boolean __CFPortSetInsert(__CFPort port, __CFPortSet portSet) {
if (MACH_PORT_NULL == port) {
return false;
}
kern_return_t ret = mach_port_insert_member(mach_task_self(), port, portSet);
return (KERN_SUCCESS == ret);
}
CF_INLINE Boolean __CFPortSetRemove(__CFPort port, __CFPortSet portSet) {
if (MACH_PORT_NULL == port) {
return false;
}
kern_return_t ret = mach_port_extract_member(mach_task_self(), port, portSet);
return (KERN_SUCCESS == ret);
}
CF_INLINE void __CFPortSetFree(__CFPortSet portSet) {
kern_return_t ret;
mach_port_name_array_t array;
mach_msg_type_number_t idx, number;
ret = mach_port_get_set_status(mach_task_self(), portSet, &array, &number);
if (KERN_SUCCESS == ret) {
for (idx = 0; idx < number; idx++) {
mach_port_extract_member(mach_task_self(), array[idx], portSet);
}
vm_deallocate(mach_task_self(), (vm_address_t)array, number * sizeof(mach_port_name_t));
}
mach_port_destroy(mach_task_self(), portSet);
}
#elif DEPLOYMENT_TARGET_WINDOWS
typedef HANDLE __CFPort;
#define CFPORT_NULL NULL
#define MAX_PORTS MAXIMUM_WAIT_OBJECTS
CF_INLINE __CFPort __CFPortAllocate(void) {
return CreateEventA(NULL, true, false, NULL);
}
CF_INLINE void __CFPortFree(__CFPort port) {
CloseHandle(port);
}
#elif DEPLOYMENT_TARGET_LINUX
typedef sem_t * __CFPort;
#define CFPORT_NULL NULL
#define MAX_PORTS 16
#define MAXIMUM_WAIT_OBJECTS MAX_PORTS
CF_INLINE __CFPort __CFPortAllocate(void) {
__CFPort port = CFPORT_NULL;
int status;
port = (__CFPort)CFAllocatorAllocate(kCFAllocatorSystemDefault,
sizeof(sem_t), 0);
CFAssert1(port != CFPORT_NULL, __kCFLogAssertion,
"%s(): Could not allocate port memory.", __PRETTY_FUNCTION__);
if (port != CFPORT_NULL) {
status = sem_init(port, false, 0);
CFAssert1(status == 0, __kCFLogAssertion,
"%s(): Could not initialize port.", __PRETTY_FUNCTION__);
}
return port;
}
CF_INLINE void __CFPortFree(__CFPort port) {
int status;
CFAssert1(port != CFPORT_NULL, __kCFLogAssertion,
"%s(): Attemping to free an invalid port.", __PRETTY_FUNCTION__);
status = sem_destroy(port);
CFAllocatorDeallocate(kCFAllocatorSystemDefault, port);
}
#endif /* DEPLOYMENT_TARGET_MACOSX */
#if !DEPLOYMENT_TARGET_MACOSX
// A simple dynamic array of __CFPorts, which grows to a high-water mark
typedef struct ___CFPortSet {
uint16_t used;
uint16_t size;
__CFPort *ports;
CFSpinLock_t lock; // insert and remove must be thread safe, like the Mach calls
} *__CFPortSet;
static __CFPortSet __CFPortSetAllocate(void) {
__CFPortSet result = (__CFPortSet)CFAllocatorAllocate(kCFAllocatorSystemDefault, sizeof(struct ___CFPortSet), 0);
result->used = 0;
result->size = 4;
result->ports = (__CFPort *)CFAllocatorAllocate(kCFAllocatorSystemDefault, result->size * sizeof(__CFPort), 0);
CF_SPINLOCK_INIT_FOR_STRUCTS(result->lock);
return result;
}
static void __CFPortSetFree(__CFPortSet portSet) {
CFAllocatorDeallocate(kCFAllocatorSystemDefault, portSet->ports);
CFAllocatorDeallocate(kCFAllocatorSystemDefault, portSet);
}
// Returns portBuf if ports fit in that space, else returns another ptr that must be freed
static __CFPort *__CFPortSetGetPorts(__CFPortSet portSet, __CFPort *portBuf, uint32_t bufSize, uint32_t *portsUsed) {
__CFSpinLock(&(portSet->lock));
__CFPort *result = portBuf;
if (bufSize < portSet->used)
result = (__CFPort *)CFAllocatorAllocate(kCFAllocatorSystemDefault, portSet->used * sizeof(__CFPort), 0);
if (portSet->used > 1) {
// rotate the ports to vaguely simulate round-robin behaviour
uint16_t lastPort = portSet->used - 1;
__CFPort swapPort = portSet->ports[0];
memmove(portSet->ports, &portSet->ports[1], lastPort * sizeof(__CFPort));
portSet->ports[lastPort] = swapPort;
}
memmove(result, portSet->ports, portSet->used * sizeof(__CFPort));
*portsUsed = portSet->used;
__CFSpinUnlock(&(portSet->lock));
return result;
}
static Boolean __CFPortSetInsert(__CFPort port, __CFPortSet portSet) {
if (NULL == port) {
return false;
}
__CFSpinLock(&(portSet->lock));
if (portSet->used >= portSet->size) {
portSet->size += 4;
portSet->ports = (__CFPort *)CFAllocatorReallocate(kCFAllocatorSystemDefault, portSet->ports, portSet->size * sizeof(__CFPort), 0);
}
if (portSet->used >= MAXIMUM_WAIT_OBJECTS) {
CFLog(kCFLogLevelWarning, CFSTR("*** More than MAXIMUM_WAIT_OBJECTS (%d) ports add to a port set. The last ones will be ignored."), MAXIMUM_WAIT_OBJECTS);
}
portSet->ports[portSet->used++] = port;
__CFSpinUnlock(&(portSet->lock));
return true;
}
static Boolean __CFPortSetRemove(__CFPort port, __CFPortSet portSet) {
int i, j;
if (NULL == port) {
return false;
}
__CFSpinLock(&(portSet->lock));
for (i = 0; i < portSet->used; i++) {
if (portSet->ports[i] == port) {
for (j = i+1; j < portSet->used; j++) {
portSet->ports[j-1] = portSet->ports[j];
}
portSet->used--;
__CFSpinUnlock(&(portSet->lock));
return true;
}
}
__CFSpinUnlock(&(portSet->lock));
return false;
}
#endif
#if !defined(__MACTYPES__) && !defined(_OS_OSTYPES_H)
#if defined(__BIG_ENDIAN__)
typedef struct UnsignedWide {
UInt32 hi;
UInt32 lo;
} UnsignedWide;
#elif defined(__LITTLE_ENDIAN__)
typedef struct UnsignedWide {
UInt32 lo;
UInt32 hi;
} UnsignedWide;
#endif
typedef UnsignedWide AbsoluteTime;
#endif
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED
extern mach_port_name_t mk_timer_create(void);
extern kern_return_t mk_timer_destroy(mach_port_name_t name);
extern kern_return_t mk_timer_arm(mach_port_name_t name, AbsoluteTime expire_time);
extern kern_return_t mk_timer_cancel(mach_port_name_t name, AbsoluteTime *result_time);
CF_INLINE AbsoluteTime __CFUInt64ToAbsoluteTime(int64_t x) {
AbsoluteTime a;
a.hi = x >> 32;
a.lo = x & (int64_t)0xFFFFFFFF;
return a;
}
static uint32_t __CFSendTrivialMachMessage(mach_port_t port, uint32_t msg_id, CFOptionFlags options, uint32_t timeout) {
kern_return_t result;
mach_msg_header_t header;
header.msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_COPY_SEND, 0);
header.msgh_size = sizeof(mach_msg_header_t);
header.msgh_remote_port = port;
header.msgh_local_port = MACH_PORT_NULL;
header.msgh_id = msg_id;
result = mach_msg(&header, MACH_SEND_MSG|options, header.msgh_size, 0, MACH_PORT_NULL, timeout, MACH_PORT_NULL);
if (result == MACH_SEND_TIMED_OUT) mach_msg_destroy(&header);
return result;
}
#endif
/* unlock a run loop and modes before doing callouts/sleeping */
/* never try to take the run loop lock with a mode locked */
/* be very careful of common subexpression elimination and compacting code, particular across locks and unlocks! */
/* run loop mode structures should never be deallocated, even if they become empty */
static CFTypeID __kCFRunLoopModeTypeID = _kCFRuntimeNotATypeID;
static CFTypeID __kCFRunLoopTypeID = _kCFRuntimeNotATypeID;
static CFTypeID __kCFRunLoopSourceTypeID = _kCFRuntimeNotATypeID;
static CFTypeID __kCFRunLoopObserverTypeID = _kCFRuntimeNotATypeID;
static CFTypeID __kCFRunLoopTimerTypeID = _kCFRuntimeNotATypeID;
typedef struct __CFRunLoopMode *CFRunLoopModeRef;
struct __CFRunLoopMode {
CFRuntimeBase _base;
pthread_mutex_t _lock; /* must have the run loop locked before locking this */
CFStringRef _name;
Boolean _stopped;
char _padding[3];
CFMutableSetRef _sources0;
CFMutableSetRef _sources1;
CFMutableArrayRef _observers;
CFMutableArrayRef _timers;
CFMutableDictionaryRef _portToV1SourceMap;
__CFPortSet _portSet;
CFIndex _observerMask;
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED
mach_port_t _timerPort;
#elif DEPLOYMENT_TARGET_LINUX
timer_t _timerPort;
#elif DEPLOYMENT_TARGET_WINDOWS
HANDLE _timerPort;
DWORD _msgQMask;
void (*_msgPump)(void);
#endif
};
CF_INLINE void __CFRunLoopModeLock(CFRunLoopModeRef rlm) {
pthread_mutex_lock(&(rlm->_lock));
// CFLog(6, CFSTR("__CFRunLoopModeLock locked %p"), rlm);
}
CF_INLINE void __CFRunLoopModeUnlock(CFRunLoopModeRef rlm) {
// CFLog(6, CFSTR("__CFRunLoopModeLock unlocking %p"), rlm);
pthread_mutex_unlock(&(rlm->_lock));
}
static Boolean __CFRunLoopModeEqual(CFTypeRef cf1, CFTypeRef cf2) {
CFRunLoopModeRef rlm1 = (CFRunLoopModeRef)cf1;
CFRunLoopModeRef rlm2 = (CFRunLoopModeRef)cf2;
return CFEqual(rlm1->_name, rlm2->_name);
}
static CFHashCode __CFRunLoopModeHash(CFTypeRef cf) {
CFRunLoopModeRef rlm = (CFRunLoopModeRef)cf;
return CFHash(rlm->_name);
}
static CFStringRef __CFRunLoopModeCopyDescription(CFTypeRef cf) {
CFRunLoopModeRef rlm = (CFRunLoopModeRef)cf;
CFMutableStringRef result;
result = CFStringCreateMutable(kCFAllocatorSystemDefault, 0);
CFStringAppendFormat(result, NULL, CFSTR("<CFRunLoopMode %p [%p]>{name = %@, "), rlm, CFGetAllocator(rlm), rlm->_name);
CFStringAppendFormat(result, NULL, CFSTR("port set = %p, "), rlm->_portSet);
CFStringAppendFormat(result, NULL, CFSTR("timer port = %p, "), rlm->_timerPort);
#if DEPLOYMENT_TARGET_WINDOWS
CFStringAppendFormat(result, NULL, CFSTR("MSGQ mask = %p,"), rlm->_msgQMask);
#endif
CFStringAppendFormat(result, NULL, CFSTR("\n\tsources0 = %@,\n\tsources1 = %@,\n\tobservers = %@,\n\ttimers = %@\n},\n"), rlm->_sources0, rlm->_sources1, rlm->_observers, rlm->_timers);
return result;
}
static void __CFRunLoopModeDeallocate(CFTypeRef cf) {
CFRunLoopModeRef rlm = (CFRunLoopModeRef)cf;
if (NULL != rlm->_sources0) CFRelease(rlm->_sources0);
if (NULL != rlm->_sources1) CFRelease(rlm->_sources1);
if (NULL != rlm->_observers) CFRelease(rlm->_observers);
if (NULL != rlm->_timers) CFRelease(rlm->_timers);
if (NULL != rlm->_portToV1SourceMap) CFRelease(rlm->_portToV1SourceMap);
CFRelease(rlm->_name);
__CFPortSetFree(rlm->_portSet);
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED
if (MACH_PORT_NULL != rlm->_timerPort) mk_timer_destroy(rlm->_timerPort);
#elif DEPLOYMENT_TARGET_WINDOWS
if (NULL != rlm->_timerPort) CloseHandle(rlm->_timerPort);
#elif DEPLOYMENT_TARGET_LINUX
if (NULL != rlm->_timerPort) timer_delete(rlm->_timerPort);
#endif
pthread_mutex_destroy(&rlm->_lock);
memset((char *)cf + sizeof(CFRuntimeBase), 0x7C, sizeof(struct __CFRunLoopMode) - sizeof(CFRuntimeBase));
}
struct _block_item {
struct _block_item *_next;
CFTypeRef _mode; // CFString or CFSet
#if __BLOCKS__
void (^_block)(void);
#else
void* _block;
#endif
};
struct __CFRunLoop {
CFRuntimeBase _base;
pthread_mutex_t _lock; /* locked for accessing mode list */
__CFPort _wakeUpPort; // used for CFRunLoopWakeUp
Boolean _ignoreWakeUps;
volatile uint32_t *_stopped;
pthread_t _pthread;
uint32_t _winthread;
CFMutableSetRef _commonModes;
CFMutableSetRef _commonModeItems;
CFRunLoopModeRef _currentMode;
CFMutableSetRef _modes;
struct _block_item *_blocks_head;
struct _block_item *_blocks_tail;
CFTypeRef _counterpart;
};
#if DEPLOYMENT_TARGET_WINDOWS
static Boolean __CFRunLoopDoSource1(CFRunLoopRef rl, CFRunLoopModeRef rlm, CFRunLoopSourceRef rls);
#endif
/* Bit 0 of the base reserved bits is used for stopped state */
/* Bit 1 of the base reserved bits is used for sleeping state */
/* Bit 2 of the base reserved bits is used for deallocating state */
CF_INLINE Boolean __CFRunLoopIsStopped(CFRunLoopRef rl) {
return (rl->_stopped && rl->_stopped[2]) ? true : false;
}
CF_INLINE void __CFRunLoopSetStopped(CFRunLoopRef rl) {
if (!rl->_stopped) {
rl->_stopped = (uint32_t volatile *)CFAllocatorAllocate(kCFAllocatorSystemDefault, 4 * sizeof(uint32_t), 0);
rl->_stopped[0] = 0x4346524C;
rl->_stopped[1] = 0x4346524C; // 'CFRL'
rl->_stopped[2] = 0x00000000; // here the value is stored
rl->_stopped[3] = 0x4346524C;
}
if (rl->_stopped) rl->_stopped[2] = 0x53544F50; // 'STOP'
}
CF_INLINE void __CFRunLoopUnsetStopped(CFRunLoopRef rl) {
if (rl->_stopped) rl->_stopped[2] = 0x0;
}
CF_INLINE Boolean __CFRunLoopIsSleeping(CFRunLoopRef rl) {
return (Boolean)__CFBitfieldGetValue(((const CFRuntimeBase *)rl)->_cfinfo[CF_INFO_BITS], 1, 1);
}
CF_INLINE void __CFRunLoopSetSleeping(CFRunLoopRef rl) {
__CFBitfieldSetValue(((CFRuntimeBase *)rl)->_cfinfo[CF_INFO_BITS], 1, 1, 1);
}
CF_INLINE void __CFRunLoopUnsetSleeping(CFRunLoopRef rl) {
__CFBitfieldSetValue(((CFRuntimeBase *)rl)->_cfinfo[CF_INFO_BITS], 1, 1, 0);
}
CF_INLINE Boolean __CFRunLoopIsDeallocating(CFRunLoopRef rl) {
return (Boolean)__CFBitfieldGetValue(((const CFRuntimeBase *)rl)->_cfinfo[CF_INFO_BITS], 2, 2);
}
CF_INLINE void __CFRunLoopSetDeallocating(CFRunLoopRef rl) {
__CFBitfieldSetValue(((CFRuntimeBase *)rl)->_cfinfo[CF_INFO_BITS], 2, 2, 1);
}
CF_INLINE void __CFRunLoopLock(CFRunLoopRef rl) {
pthread_mutex_lock(&(((CFRunLoopRef)rl)->_lock));
// CFLog(6, CFSTR("__CFRunLoopLock locked %p"), rl);
}
CF_INLINE void __CFRunLoopUnlock(CFRunLoopRef rl) {
// CFLog(6, CFSTR("__CFRunLoopLock unlocking %p"), rl);
pthread_mutex_unlock(&(((CFRunLoopRef)rl)->_lock));
}
static CFStringRef __CFRunLoopCopyDescription(CFTypeRef cf) {
CFRunLoopRef rl = (CFRunLoopRef)cf;
CFMutableStringRef result;
result = CFStringCreateMutable(kCFAllocatorSystemDefault, 0);
#if DEPLOYMENT_TARGET_WINDOWS
CFStringAppendFormat(result, NULL, CFSTR("<CFRunLoop %p [%p]>{wakeup port = 0x%x, stopped = %s,\ncurrent mode = %@,\n"), cf, CFGetAllocator(cf), rl->_wakeUpPort, (rl->_stopped && *(rl->_stopped)) ? "true" : "false", rl->_currentMode ? rl->_currentMode->_name : CFSTR("(none)"));
#else
CFStringAppendFormat(result, NULL, CFSTR("<CFRunLoop %p [%p]>{wakeup port = 0x%x, stopped = %s,\ncurrent mode = %@,\n"), cf, CFGetAllocator(cf), rl->_wakeUpPort, (rl->_stopped && (rl->_stopped[2] == 0x53544F50)) ? "true" : "false", rl->_currentMode ? rl->_currentMode->_name : CFSTR("(none)"));
#endif
CFStringAppendFormat(result, NULL, CFSTR("common modes = %@,\ncommon mode items = %@,\nmodes = %@}\n"), rl->_commonModes, rl->_commonModeItems, rl->_modes);
return result;
}
__private_extern__ void __CFRunLoopDump() { // __private_extern__ to keep the compiler from discarding it
CFShow(CFCopyDescription(CFRunLoopGetCurrent()));
}
CF_INLINE void __CFRunLoopLockInit(pthread_mutex_t *lock) {
pthread_mutexattr_t mattr;
pthread_mutexattr_init(&mattr);
pthread_mutexattr_settype(&mattr, PTHREAD_MUTEX_RECURSIVE);
int32_t mret = pthread_mutex_init(lock, &mattr);
pthread_mutexattr_destroy(&mattr);
if (0 != mret) {
}
}
/* call with rl locked */
static CFRunLoopModeRef __CFRunLoopFindMode(CFRunLoopRef rl, CFStringRef modeName, Boolean create) {
CHECK_FOR_FORK();
CFRunLoopModeRef rlm;
struct __CFRunLoopMode srlm;
memset(&srlm, 0, sizeof(srlm));
srlm._base._cfisa = __CFISAForTypeID(__kCFRunLoopModeTypeID);
_CFRuntimeSetInstanceTypeID(&srlm, __kCFRunLoopModeTypeID);
srlm._name = modeName;
rlm = (CFRunLoopModeRef)CFSetGetValue(rl->_modes, &srlm);
if (NULL != rlm) {
__CFRunLoopModeLock(rlm);
return rlm;
}
if (!create) {
return NULL;
}
rlm = (CFRunLoopModeRef)_CFRuntimeCreateInstance(kCFAllocatorSystemDefault, __kCFRunLoopModeTypeID, sizeof(struct __CFRunLoopMode) - sizeof(CFRuntimeBase), NULL);
if (NULL == rlm) {
return NULL;
}
__CFRunLoopLockInit(&rlm->_lock);
rlm->_name = CFStringCreateCopy(kCFAllocatorSystemDefault, modeName);
rlm->_stopped = false;
rlm->_portToV1SourceMap = NULL;
rlm->_sources0 = NULL;
rlm->_sources1 = NULL;
rlm->_observers = NULL;
rlm->_timers = NULL;
rlm->_observerMask = 0;
rlm->_portSet = __CFPortSetAllocate();
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED
rlm->_timerPort = mk_timer_create();
#elif DEPLOYMENT_TARGET_WINDOWS
// We use a manual reset timer because it is possible that we will WaitForMultipleObjectsEx on the timer port but not service it on that run loop iteration. The event is reset when we handle the timers.
rlm->_timerPort = CreateWaitableTimer(NULL, TRUE, NULL);
#elif DEPLOYMENT_TARGET_LINUX
struct sigevent evp;
memset(&evp, 0x00, sizeof(evp));
evp.sigev_notify = SIGEV_NONE;
timer_create(CLOCK_MONOTONIC, &evp, &rlm->_timerPort);
#endif
if (!__CFPortSetInsert(rlm->_timerPort, rlm->_portSet)) HALT;
if (!__CFPortSetInsert(rl->_wakeUpPort, rlm->_portSet)) HALT;
#if DEPLOYMENT_TARGET_WINDOWS
rlm->_msgQMask = 0;
rlm->_msgPump = NULL;
#endif
CFSetAddValue(rl->_modes, rlm);
CFRelease(rlm);
__CFRunLoopModeLock(rlm); /* return mode locked */
return rlm;
}
// expects rl and rlm locked
static Boolean __CFRunLoopModeIsEmpty(CFRunLoopRef rl, CFRunLoopModeRef rlm, CFRunLoopModeRef previousMode) {
CHECK_FOR_FORK();
if (NULL == rlm) return true;
#if DEPLOYMENT_TARGET_WINDOWS
if (0 != rlm->_msgQMask) return false;
#endif
#if __DISPATCH__
Boolean libdispatchQSafe = pthread_main_np() && ((HANDLE_DISPATCH_ON_BASE_INVOCATION_ONLY && NULL == previousMode) || (!HANDLE_DISPATCH_ON_BASE_INVOCATION_ONLY && 0 == _CFGetTSD(__CFTSDKeyIsInGCDMainQ)));
if (libdispatchQSafe && (CFRunLoopGetMain() == rl) && CFSetContainsValue(rl->_commonModes, rlm->_name)) return false; // represents the libdispatch main queue
#endif
if (NULL != rlm->_sources0 && 0 < CFSetGetCount(rlm->_sources0)) return false;
if (NULL != rlm->_sources1 && 0 < CFSetGetCount(rlm->_sources1)) return false;
if (NULL != rlm->_timers && 0 < CFArrayGetCount(rlm->_timers)) return false;
struct _block_item *item = rl->_blocks_head;
while (item) {
struct _block_item *curr = item;
item = item->_next;
Boolean doit = false;
if (CFStringGetTypeID() == CFGetTypeID(curr->_mode)) {
doit = CFEqual(curr->_mode, rlm->_name) || (CFEqual(curr->_mode, kCFRunLoopCommonModes) && CFSetContainsValue(rl->_commonModes, rlm->_name));
} else {
doit = CFSetContainsValue((CFSetRef)curr->_mode, rlm->_name) || (CFSetContainsValue((CFSetRef)curr->_mode, kCFRunLoopCommonModes) && CFSetContainsValue(rl->_commonModes, rlm->_name));
}
if (doit) return false;
}
return true;
}
#if DEPLOYMENT_TARGET_WINDOWS
uint32_t _CFRunLoopGetWindowsMessageQueueMask(CFRunLoopRef rl, CFStringRef modeName) {
if (modeName == kCFRunLoopCommonModes) {
CFLog(kCFLogLevelError, CFSTR("_CFRunLoopGetWindowsMessageQueueMask: kCFRunLoopCommonModes unsupported"));
HALT;
}
DWORD result = 0;
__CFRunLoopLock(rl);
CFRunLoopModeRef rlm = __CFRunLoopFindMode(rl, modeName, false);
if (rlm) {
result = rlm->_msgQMask;
__CFRunLoopModeUnlock(rlm);
}
__CFRunLoopUnlock(rl);
return (uint32_t)result;
}
void _CFRunLoopSetWindowsMessageQueueMask(CFRunLoopRef rl, uint32_t mask, CFStringRef modeName) {
if (modeName == kCFRunLoopCommonModes) {
CFLog(kCFLogLevelError, CFSTR("_CFRunLoopSetWindowsMessageQueueMask: kCFRunLoopCommonModes unsupported"));
HALT;
}
__CFRunLoopLock(rl);
CFRunLoopModeRef rlm = __CFRunLoopFindMode(rl, modeName, true);
rlm->_msgQMask = (DWORD)mask;
__CFRunLoopModeUnlock(rlm);
__CFRunLoopUnlock(rl);
}
uint32_t _CFRunLoopGetWindowsThreadID(CFRunLoopRef rl) {
return rl->_winthread;
}
CFWindowsMessageQueueHandler _CFRunLoopGetWindowsMessageQueueHandler(CFRunLoopRef rl, CFStringRef modeName) {
if (modeName == kCFRunLoopCommonModes) {
CFLog(kCFLogLevelError, CFSTR("_CFRunLoopGetWindowsMessageQueueMask: kCFRunLoopCommonModes unsupported"));
HALT;
}
if (rl != CFRunLoopGetCurrent()) {
CFLog(kCFLogLevelError, CFSTR("_CFRunLoopGetWindowsMessageQueueHandler: run loop parameter must be the current run loop"));
HALT;
}
void (*result)(void) = NULL;
__CFRunLoopLock(rl);
CFRunLoopModeRef rlm = __CFRunLoopFindMode(rl, modeName, false);
if (rlm) {
result = rlm->_msgPump;
__CFRunLoopModeUnlock(rlm);
}
__CFRunLoopUnlock(rl);
return result;
}
void _CFRunLoopSetWindowsMessageQueueHandler(CFRunLoopRef rl, CFStringRef modeName, CFWindowsMessageQueueHandler func) {
if (modeName == kCFRunLoopCommonModes) {
CFLog(kCFLogLevelError, CFSTR("_CFRunLoopGetWindowsMessageQueueMask: kCFRunLoopCommonModes unsupported"));
HALT;
}
if (rl != CFRunLoopGetCurrent()) {
CFLog(kCFLogLevelError, CFSTR("_CFRunLoopGetWindowsMessageQueueHandler: run loop parameter must be the current run loop"));
HALT;
}
__CFRunLoopLock(rl);
CFRunLoopModeRef rlm = __CFRunLoopFindMode(rl, modeName, true);
rlm->_msgPump = func;
__CFRunLoopModeUnlock(rlm);
__CFRunLoopUnlock(rl);
}
#endif
/* Bit 3 in the base reserved bits is used for invalid state in run loop objects */
CF_INLINE Boolean __CFIsValid(const void *cf) {
return (Boolean)__CFBitfieldGetValue(((const CFRuntimeBase *)cf)->_cfinfo[CF_INFO_BITS], 3, 3);
}
CF_INLINE void __CFSetValid(void *cf) {
__CFBitfieldSetValue(((CFRuntimeBase *)cf)->_cfinfo[CF_INFO_BITS], 3, 3, 1);
}
CF_INLINE void __CFUnsetValid(void *cf) {
__CFBitfieldSetValue(((CFRuntimeBase *)cf)->_cfinfo[CF_INFO_BITS], 3, 3, 0);
}
struct __CFRunLoopSource {
CFRuntimeBase _base;
uint32_t _bits;
pthread_mutex_t _lock;
CFIndex _order; /* immutable */
CFMutableBagRef _runLoops;
union {
CFRunLoopSourceContext version0; /* immutable, except invalidation */
CFRunLoopSourceContext1 version1; /* immutable, except invalidation */
} _context;
};
/* Bit 1 of the base reserved bits is used for signalled state */
CF_INLINE Boolean __CFRunLoopSourceIsSignaled(CFRunLoopSourceRef rls) {
return (Boolean)__CFBitfieldGetValue(rls->_bits, 1, 1);
}
CF_INLINE void __CFRunLoopSourceSetSignaled(CFRunLoopSourceRef rls) {
__CFBitfieldSetValue(rls->_bits, 1, 1, 1);
}
CF_INLINE void __CFRunLoopSourceUnsetSignaled(CFRunLoopSourceRef rls) {
__CFBitfieldSetValue(rls->_bits, 1, 1, 0);
}
CF_INLINE void __CFRunLoopSourceLock(CFRunLoopSourceRef rls) {
pthread_mutex_lock(&(rls->_lock));
// CFLog(6, CFSTR("__CFRunLoopSourceLock locked %p"), rls);
}
CF_INLINE void __CFRunLoopSourceUnlock(CFRunLoopSourceRef rls) {
// CFLog(6, CFSTR("__CFRunLoopSourceLock unlocking %p"), rls);
pthread_mutex_unlock(&(rls->_lock));
}
struct __CFRunLoopObserver {
CFRuntimeBase _base;
pthread_mutex_t _lock;
CFRunLoopRef _runLoop;
CFIndex _rlCount;
CFOptionFlags _activities; /* immutable */
CFIndex _order; /* immutable */
CFRunLoopObserverCallBack _callout; /* immutable */
CFRunLoopObserverContext _context; /* immutable, except invalidation */
};
/* Bit 0 of the base reserved bits is used for firing state */
/* Bit 1 of the base reserved bits is used for repeats state */
CF_INLINE Boolean __CFRunLoopObserverIsFiring(CFRunLoopObserverRef rlo) {
return (Boolean)__CFBitfieldGetValue(((const CFRuntimeBase *)rlo)->_cfinfo[CF_INFO_BITS], 0, 0);
}
CF_INLINE void __CFRunLoopObserverSetFiring(CFRunLoopObserverRef rlo) {
__CFBitfieldSetValue(((CFRuntimeBase *)rlo)->_cfinfo[CF_INFO_BITS], 0, 0, 1);
}
CF_INLINE void __CFRunLoopObserverUnsetFiring(CFRunLoopObserverRef rlo) {
__CFBitfieldSetValue(((CFRuntimeBase *)rlo)->_cfinfo[CF_INFO_BITS], 0, 0, 0);
}
CF_INLINE Boolean __CFRunLoopObserverRepeats(CFRunLoopObserverRef rlo) {
return (Boolean)__CFBitfieldGetValue(((const CFRuntimeBase *)rlo)->_cfinfo[CF_INFO_BITS], 1, 1);
}
CF_INLINE void __CFRunLoopObserverSetRepeats(CFRunLoopObserverRef rlo) {
__CFBitfieldSetValue(((CFRuntimeBase *)rlo)->_cfinfo[CF_INFO_BITS], 1, 1, 1);
}
CF_INLINE void __CFRunLoopObserverUnsetRepeats(CFRunLoopObserverRef rlo) {
__CFBitfieldSetValue(((CFRuntimeBase *)rlo)->_cfinfo[CF_INFO_BITS], 1, 1, 0);
}
CF_INLINE void __CFRunLoopObserverLock(CFRunLoopObserverRef rlo) {
pthread_mutex_lock(&(rlo->_lock));
// CFLog(6, CFSTR("__CFRunLoopObserverLock locked %p"), rlo);
}
CF_INLINE void __CFRunLoopObserverUnlock(CFRunLoopObserverRef rlo) {
// CFLog(6, CFSTR("__CFRunLoopObserverLock unlocking %p"), rlo);
pthread_mutex_unlock(&(rlo->_lock));
}
static void __CFRunLoopObserverSchedule(CFRunLoopObserverRef rlo, CFRunLoopRef rl, CFRunLoopModeRef rlm) {
__CFRunLoopObserverLock(rlo);
if (0 == rlo->_rlCount) {
rlo->_runLoop = rl;
}
rlo->_rlCount++;
__CFRunLoopObserverUnlock(rlo);
}
static void __CFRunLoopObserverCancel(CFRunLoopObserverRef rlo, CFRunLoopRef rl, CFRunLoopModeRef rlm) {
__CFRunLoopObserverLock(rlo);
rlo->_rlCount--;
if (0 == rlo->_rlCount) {
rlo->_runLoop = NULL;
}
__CFRunLoopObserverUnlock(rlo);
}
struct __CFRunLoopTimer {
CFRuntimeBase _base;
uint16_t _bits;
pthread_mutex_t _lock;
CFRunLoopRef _runLoop;
CFMutableSetRef _rlModes;
CFAbsoluteTime _nextFireDate;
CFTimeInterval _interval; /* immutable */
int64_t _fireTSR; /* TSR units */
CFIndex _order; /* immutable */
CFRunLoopTimerCallBack _callout; /* immutable */
CFRunLoopTimerContext _context; /* immutable, except invalidation */
};
/* Bit 0 of the base reserved bits is used for firing state */
/* Bit 1 of the base reserved bits is used for fired-during-callout state */
CF_INLINE Boolean __CFRunLoopTimerIsFiring(CFRunLoopTimerRef rlt) {
return (Boolean)__CFBitfieldGetValue(rlt->_bits, 0, 0);
}
CF_INLINE void __CFRunLoopTimerSetFiring(CFRunLoopTimerRef rlt) {
__CFBitfieldSetValue(rlt->_bits, 0, 0, 1);
}
CF_INLINE void __CFRunLoopTimerUnsetFiring(CFRunLoopTimerRef rlt) {
__CFBitfieldSetValue(rlt->_bits, 0, 0, 0);
}
CF_INLINE Boolean __CFRunLoopTimerIsDeallocating(CFRunLoopTimerRef rlt) {
return (Boolean)__CFBitfieldGetValue(rlt->_bits, 2, 2);
}
CF_INLINE void __CFRunLoopTimerSetDeallocating(CFRunLoopTimerRef rlt) {
__CFBitfieldSetValue(rlt->_bits, 2, 2, 1);
}
CF_INLINE void __CFRunLoopTimerLock(CFRunLoopTimerRef rlt) {
pthread_mutex_lock(&(rlt->_lock));
// CFLog(6, CFSTR("__CFRunLoopTimerLock locked %p"), rlt);
}
CF_INLINE void __CFRunLoopTimerUnlock(CFRunLoopTimerRef rlt) {
// CFLog(6, CFSTR("__CFRunLoopTimerLock unlocking %p"), rlt);
pthread_mutex_unlock(&(rlt->_lock));
}
static CFSpinLock_t __CFRLTFireTSRLock = CFSpinLockInit;
CF_INLINE void __CFRunLoopTimerFireTSRLock(void) {
__CFSpinLock(&__CFRLTFireTSRLock);
}
CF_INLINE void __CFRunLoopTimerFireTSRUnlock(void) {
__CFSpinUnlock(&__CFRLTFireTSRLock);
}
#if DEPLOYMENT_TARGET_WINDOWS || DEPLOYMENT_TARGET_LINUX
struct _collectTimersContext {
CFMutableArrayRef results;
int64_t cutoffTSR;
};
static void __CFRunLoopCollectTimers(const void *value, void *ctx) {
CFRunLoopTimerRef rlt = (CFRunLoopTimerRef)value;
struct _collectTimersContext *context = (struct _collectTimersContext *)ctx;
if (rlt->_fireTSR <= context->cutoffTSR) {
if (NULL == context->results)
context->results = CFArrayCreateMutable(kCFAllocatorSystemDefault, 0, &kCFTypeArrayCallBacks);
CFArrayAppendValue(context->results, rlt);
}
}
// RunLoop and RunLoopMode must be locked
static void __CFRunLoopTimersToFireRecursive(CFRunLoopRef rl, CFRunLoopModeRef rlm, struct _collectTimersContext *ctxt) {
__CFRunLoopTimerFireTSRLock();