#include <spawn.h>
#include <spawn_private.h>
#include <sys/spawn_internal.h>
+#include <sys/ulock.h>
// TODO: remove me when internal.h can include *_private.h itself
#include "workqueue_private.h"
#include "qos_private.h"
-static pthread_priority_t _main_qos = QOS_CLASS_UNSPECIFIED;
-
#define PTHREAD_OVERRIDE_SIGNATURE (0x6f766572)
#define PTHREAD_OVERRIDE_SIG_DEAD (0x7265766f)
struct pthread_override_s
{
uint32_t sig;
- pthread_t pthread;
mach_port_t kthread;
+ pthread_t pthread;
pthread_priority_t priority;
bool malloced;
};
-void
-_pthread_set_main_qos(pthread_priority_t qos)
+thread_qos_t
+_pthread_qos_class_to_thread_qos(qos_class_t qos)
{
- _main_qos = qos;
+ switch (qos) {
+ case QOS_CLASS_USER_INTERACTIVE: return THREAD_QOS_USER_INTERACTIVE;
+ case QOS_CLASS_USER_INITIATED: return THREAD_QOS_USER_INITIATED;
+ case QOS_CLASS_DEFAULT: return THREAD_QOS_LEGACY;
+ case QOS_CLASS_UTILITY: return THREAD_QOS_UTILITY;
+ case QOS_CLASS_BACKGROUND: return THREAD_QOS_BACKGROUND;
+ case QOS_CLASS_MAINTENANCE: return THREAD_QOS_MAINTENANCE;
+ default: return THREAD_QOS_UNSPECIFIED;
+ }
}
-int
-pthread_attr_set_qos_class_np(pthread_attr_t *__attr,
- qos_class_t __qos_class,
- int __relative_priority)
+static inline qos_class_t
+_pthread_qos_class_from_thread_qos(thread_qos_t tqos)
{
- if (!(__pthread_supported_features & PTHREAD_FEATURE_BSDTHREADCTL)) {
- return ENOTSUP;
- }
+ static const qos_class_t thread_qos_to_qos_class[THREAD_QOS_LAST] = {
+ [THREAD_QOS_UNSPECIFIED] = QOS_CLASS_UNSPECIFIED,
+ [THREAD_QOS_MAINTENANCE] = QOS_CLASS_MAINTENANCE,
+ [THREAD_QOS_BACKGROUND] = QOS_CLASS_BACKGROUND,
+ [THREAD_QOS_UTILITY] = QOS_CLASS_UTILITY,
+ [THREAD_QOS_LEGACY] = QOS_CLASS_DEFAULT,
+ [THREAD_QOS_USER_INITIATED] = QOS_CLASS_USER_INITIATED,
+ [THREAD_QOS_USER_INTERACTIVE] = QOS_CLASS_USER_INTERACTIVE,
+ };
+ if (os_unlikely(tqos >= THREAD_QOS_LAST)) return QOS_CLASS_UNSPECIFIED;
+ return thread_qos_to_qos_class[tqos];
+}
- if (__relative_priority > 0 || __relative_priority < QOS_MIN_RELATIVE_PRIORITY) {
- return EINVAL;
+static inline thread_qos_t
+_pthread_validate_qos_class_and_relpri(qos_class_t qc, int relpri)
+{
+ if (relpri > 0 || relpri < QOS_MIN_RELATIVE_PRIORITY) {
+ return THREAD_QOS_UNSPECIFIED;
}
+ return _pthread_qos_class_to_thread_qos(qc);
+}
- int ret = EINVAL;
- if (__attr->sig == _PTHREAD_ATTR_SIG) {
- if (!__attr->schedset) {
- __attr->qosclass = _pthread_priority_make_newest(__qos_class, __relative_priority, 0);
- __attr->qosset = 1;
- ret = 0;
- }
- }
+static inline void
+_pthread_priority_split(pthread_priority_t pp, qos_class_t *qc, int *relpri)
+{
+ thread_qos_t qos = _pthread_priority_thread_qos(pp);
+ if (qc) *qc = _pthread_qos_class_from_thread_qos(qos);
+ if (relpri) *relpri = _pthread_priority_relpri(pp);
+}
- return ret;
+void
+_pthread_set_main_qos(pthread_priority_t qos)
+{
+ _main_qos = (uint32_t)qos;
}
int
-pthread_attr_get_qos_class_np(pthread_attr_t * __restrict __attr,
- qos_class_t * __restrict __qos_class,
- int * __restrict __relative_priority)
+pthread_attr_set_qos_class_np(pthread_attr_t *attr, qos_class_t qc, int relpri)
{
- if (!(__pthread_supported_features & PTHREAD_FEATURE_BSDTHREADCTL)) {
- return ENOTSUP;
- }
-
- int ret = EINVAL;
- if (__attr->sig == _PTHREAD_ATTR_SIG) {
- if (__attr->qosset) {
- qos_class_t qos; int relpri;
- _pthread_priority_split_newest(__attr->qosclass, qos, relpri);
-
- if (__qos_class) { *__qos_class = qos; }
- if (__relative_priority) { *__relative_priority = relpri; }
- } else {
- if (__qos_class) { *__qos_class = 0; }
- if (__relative_priority) { *__relative_priority = 0; }
- }
- ret = 0;
+ thread_qos_t qos = _pthread_validate_qos_class_and_relpri(qc, relpri);
+ if (attr->sig != _PTHREAD_ATTR_SIG || attr->schedset) {
+ return EINVAL;
}
- return ret;
+ attr->qosclass = _pthread_priority_make_from_thread_qos(qos, relpri, 0);
+ attr->qosset = 1;
+ attr->schedset = 0;
+ return 0;
}
int
-pthread_set_qos_class_self_np(qos_class_t __qos_class,
- int __relative_priority)
+pthread_attr_get_qos_class_np(pthread_attr_t *attr, qos_class_t *qc, int *relpri)
{
- if (!(__pthread_supported_features & PTHREAD_FEATURE_BSDTHREADCTL)) {
- return ENOTSUP;
- }
-
- if (__relative_priority > 0 || __relative_priority < QOS_MIN_RELATIVE_PRIORITY) {
+ if (attr->sig != _PTHREAD_ATTR_SIG) {
return EINVAL;
}
- pthread_priority_t priority = _pthread_priority_make_newest(__qos_class, __relative_priority, 0);
-
- if (__pthread_supported_features & PTHREAD_FEATURE_SETSELF) {
- return _pthread_set_properties_self(_PTHREAD_SET_SELF_QOS_FLAG, priority, 0);
- } else {
- /* We set the thread QoS class in the TSD and then call into the kernel to
- * read the value out of it and set the QoS class.
- */
- _pthread_setspecific_direct(_PTHREAD_TSD_SLOT_PTHREAD_QOS_CLASS, priority);
-
- mach_port_t kport = pthread_mach_thread_np(pthread_self());
- int res = __bsdthread_ctl(BSDTHREAD_CTL_SET_QOS, kport, &pthread_self()->tsd[_PTHREAD_TSD_SLOT_PTHREAD_QOS_CLASS], 0);
-
- if (res == -1) {
- res = errno;
- }
-
- return res;
- }
+ _pthread_priority_split(attr->qosset ? attr->qosclass : 0, qc, relpri);
+ return 0;
}
int
-pthread_set_qos_class_np(pthread_t __pthread,
- qos_class_t __qos_class,
- int __relative_priority)
+pthread_set_qos_class_self_np(qos_class_t qc, int relpri)
{
- if (!(__pthread_supported_features & PTHREAD_FEATURE_BSDTHREADCTL)) {
- return ENOTSUP;
- }
-
- if (__relative_priority > 0 || __relative_priority < QOS_MIN_RELATIVE_PRIORITY) {
+ thread_qos_t qos = _pthread_validate_qos_class_and_relpri(qc, relpri);
+ if (!qos) {
return EINVAL;
}
- if (__pthread != pthread_self()) {
+ pthread_priority_t pp = _pthread_priority_make_from_thread_qos(qos, relpri, 0);
+ return _pthread_set_properties_self(_PTHREAD_SET_SELF_QOS_FLAG, pp, 0);
+}
+
+int
+pthread_set_qos_class_np(pthread_t thread, qos_class_t qc, int relpri)
+{
+ if (thread != pthread_self()) {
/* The kext now enforces this anyway, if we check here too, it allows us to call
* _pthread_set_properties_self later if we can.
*/
return EPERM;
}
-
- pthread_priority_t priority = _pthread_priority_make_newest(__qos_class, __relative_priority, 0);
-
- if (__pthread_supported_features & PTHREAD_FEATURE_SETSELF) {
- /* If we have _pthread_set_properties_self, then we can easily set this using that. */
- return _pthread_set_properties_self(_PTHREAD_SET_SELF_QOS_FLAG, priority, 0);
- } else {
- /* We set the thread QoS class in the TSD and then call into the kernel to
- * read the value out of it and set the QoS class.
- */
- if (__pthread == pthread_self()) {
- _pthread_setspecific_direct(_PTHREAD_TSD_SLOT_PTHREAD_QOS_CLASS, priority);
- } else {
- __pthread->tsd[_PTHREAD_TSD_SLOT_PTHREAD_QOS_CLASS] = priority;
- }
-
- mach_port_t kport = pthread_mach_thread_np(__pthread);
- int res = __bsdthread_ctl(BSDTHREAD_CTL_SET_QOS, kport, &__pthread->tsd[_PTHREAD_TSD_SLOT_PTHREAD_QOS_CLASS], 0);
-
- if (res == -1) {
- res = errno;
- }
-
- return res;
- }
+ return pthread_set_qos_class_self_np(qc, relpri);
}
int
-pthread_get_qos_class_np(pthread_t __pthread,
- qos_class_t * __restrict __qos_class,
- int * __restrict __relative_priority)
+pthread_get_qos_class_np(pthread_t thread, qos_class_t *qc, int *relpri)
{
- if (!(__pthread_supported_features & PTHREAD_FEATURE_BSDTHREADCTL)) {
- return ENOTSUP;
- }
-
- pthread_priority_t priority;
-
- if (__pthread == pthread_self()) {
- priority = _pthread_getspecific_direct(_PTHREAD_TSD_SLOT_PTHREAD_QOS_CLASS);
- } else {
- priority = __pthread->tsd[_PTHREAD_TSD_SLOT_PTHREAD_QOS_CLASS];
- }
-
- qos_class_t qos; int relpri;
- _pthread_priority_split_newest(priority, qos, relpri);
-
- if (__qos_class) { *__qos_class = qos; }
- if (__relative_priority) { *__relative_priority = relpri; }
-
+ pthread_priority_t pp = thread->tsd[_PTHREAD_TSD_SLOT_PTHREAD_QOS_CLASS];
+ _pthread_priority_split(pp, qc, relpri);
return 0;
}
qos_class_t
qos_class_self(void)
{
- if (!(__pthread_supported_features & PTHREAD_FEATURE_BSDTHREADCTL)) {
- return QOS_CLASS_UNSPECIFIED;
- }
-
- pthread_priority_t p = _pthread_getspecific_direct(_PTHREAD_TSD_SLOT_PTHREAD_QOS_CLASS);
- qos_class_t c = _pthread_priority_get_qos_newest(p);
-
- return c;
+ pthread_priority_t pp;
+ pp = _pthread_getspecific_direct(_PTHREAD_TSD_SLOT_PTHREAD_QOS_CLASS);
+ return _pthread_qos_class_from_thread_qos(_pthread_priority_thread_qos(pp));
}
qos_class_t
qos_class_main(void)
{
- return _pthread_priority_get_qos_newest(_main_qos);
+ pthread_priority_t pp = _main_qos;
+ return _pthread_qos_class_from_thread_qos(_pthread_priority_thread_qos(pp));
}
pthread_priority_t
-_pthread_qos_class_encode(qos_class_t qos_class, int relative_priority, unsigned long flags)
+_pthread_qos_class_encode(qos_class_t qc, int relpri, unsigned long flags)
{
- if ((__pthread_supported_features & PTHREAD_FEATURE_QOS_MAINTENANCE) == 0) {
- return _pthread_priority_make_version2(qos_class, relative_priority, flags);
- } else {
- return _pthread_priority_make_newest(qos_class, relative_priority, flags);
- }
+ thread_qos_t qos = _pthread_qos_class_to_thread_qos(qc);
+ return _pthread_priority_make_from_thread_qos(qos, relpri, flags);
}
qos_class_t
-_pthread_qos_class_decode(pthread_priority_t priority, int *relative_priority, unsigned long *flags)
+_pthread_qos_class_decode(pthread_priority_t pp, int *relpri, unsigned long *flags)
{
- qos_class_t qos; int relpri;
-
- if ((__pthread_supported_features & PTHREAD_FEATURE_QOS_MAINTENANCE) == 0) {
- _pthread_priority_split_version2(priority, qos, relpri);
- } else {
- _pthread_priority_split_newest(priority, qos, relpri);
- }
-
- if (relative_priority) { *relative_priority = relpri; }
- if (flags) { *flags = _pthread_priority_get_flags(priority); }
- return qos;
+ qos_class_t qc;
+ _pthread_priority_split(pp, &qc, relpri);
+ if (flags) *flags = (pp & _PTHREAD_PRIORITY_FLAGS_MASK);
+ return qc;
}
+// Encode a legacy workqueue API priority into a pthread_priority_t. This API
+// is deprecated and can be removed when the simulator no longer uses it.
pthread_priority_t
_pthread_qos_class_encode_workqueue(int queue_priority, unsigned long flags)
{
- if ((__pthread_supported_features & PTHREAD_FEATURE_QOS_DEFAULT) == 0) {
- switch (queue_priority) {
- case WORKQ_HIGH_PRIOQUEUE:
- return _pthread_priority_make_version1(QOS_CLASS_USER_INTERACTIVE, 0, flags);
- case WORKQ_DEFAULT_PRIOQUEUE:
- return _pthread_priority_make_version1(QOS_CLASS_USER_INITIATED, 0, flags);
- case WORKQ_LOW_PRIOQUEUE:
- case WORKQ_NON_INTERACTIVE_PRIOQUEUE:
- return _pthread_priority_make_version1(QOS_CLASS_UTILITY, 0, flags);
- case WORKQ_BG_PRIOQUEUE:
- return _pthread_priority_make_version1(QOS_CLASS_BACKGROUND, 0, flags);
- default:
- __pthread_abort();
- }
- }
-
- if ((__pthread_supported_features & PTHREAD_FEATURE_QOS_MAINTENANCE) == 0) {
- switch (queue_priority) {
- case WORKQ_HIGH_PRIOQUEUE:
- return _pthread_priority_make_version2(QOS_CLASS_USER_INITIATED, 0, flags);
- case WORKQ_DEFAULT_PRIOQUEUE:
- return _pthread_priority_make_version2(QOS_CLASS_DEFAULT, 0, flags);
- case WORKQ_LOW_PRIOQUEUE:
- case WORKQ_NON_INTERACTIVE_PRIOQUEUE:
- return _pthread_priority_make_version2(QOS_CLASS_UTILITY, 0, flags);
- case WORKQ_BG_PRIOQUEUE:
- return _pthread_priority_make_version2(QOS_CLASS_BACKGROUND, 0, flags);
- /* Legacy dispatch does not use QOS_CLASS_MAINTENANCE, so no need to handle it here */
- default:
- __pthread_abort();
- }
- }
-
+ thread_qos_t qos;
switch (queue_priority) {
- case WORKQ_HIGH_PRIOQUEUE:
- return _pthread_priority_make_newest(QOS_CLASS_USER_INITIATED, 0, flags);
- case WORKQ_DEFAULT_PRIOQUEUE:
- return _pthread_priority_make_newest(QOS_CLASS_DEFAULT, 0, flags);
- case WORKQ_LOW_PRIOQUEUE:
- case WORKQ_NON_INTERACTIVE_PRIOQUEUE:
- return _pthread_priority_make_newest(QOS_CLASS_UTILITY, 0, flags);
- case WORKQ_BG_PRIOQUEUE:
- return _pthread_priority_make_newest(QOS_CLASS_BACKGROUND, 0, flags);
- /* Legacy dispatch does not use QOS_CLASS_MAINTENANCE, so no need to handle it here */
- default:
- __pthread_abort();
- }
+ case WORKQ_HIGH_PRIOQUEUE: qos = THREAD_QOS_USER_INTERACTIVE; break;
+ case WORKQ_DEFAULT_PRIOQUEUE: qos = THREAD_QOS_LEGACY; break;
+ case WORKQ_NON_INTERACTIVE_PRIOQUEUE:
+ case WORKQ_LOW_PRIOQUEUE: qos = THREAD_QOS_UTILITY; break;
+ case WORKQ_BG_PRIOQUEUE: qos = THREAD_QOS_BACKGROUND; break;
+ default:
+ PTHREAD_CLIENT_CRASH(queue_priority, "Invalid priority");
+ }
+ return _pthread_priority_make_from_thread_qos(qos, 0, flags);
}
+#define _PTHREAD_SET_SELF_OUTSIDE_QOS_SKIP \
+ (_PTHREAD_SET_SELF_QOS_FLAG | _PTHREAD_SET_SELF_FIXEDPRIORITY_FLAG | \
+ _PTHREAD_SET_SELF_TIMESHARE_FLAG | \
+ _PTHREAD_SET_SELF_ALTERNATE_AMX)
+
int
-_pthread_set_properties_self(_pthread_set_flags_t flags, pthread_priority_t priority, mach_port_t voucher)
+_pthread_set_properties_self(_pthread_set_flags_t flags,
+ pthread_priority_t priority, mach_port_t voucher)
{
- if (!(__pthread_supported_features & PTHREAD_FEATURE_SETSELF)) {
- return ENOTSUP;
+ pthread_t self = pthread_self();
+ _pthread_set_flags_t kflags = flags;
+ int rv = 0;
+
+ if (self->wq_outsideqos && (flags & _PTHREAD_SET_SELF_OUTSIDE_QOS_SKIP)) {
+ // A number of properties cannot be altered if we are a workloop
+ // thread that has outside of QoS properties applied to it.
+ kflags &= ~_PTHREAD_SET_SELF_OUTSIDE_QOS_SKIP;
+ if (kflags == 0) goto skip;
}
- int rv = __bsdthread_ctl(BSDTHREAD_CTL_SET_SELF, priority, voucher, flags);
+ rv = __bsdthread_ctl(BSDTHREAD_CTL_SET_SELF, priority, voucher, kflags);
- /* Set QoS TSD if we succeeded or only failed the voucher half. */
+skip:
+ // Set QoS TSD if we succeeded, or only failed the voucher portion of the
+ // call. Additionally, if we skipped setting QoS because of outside-of-QoS
+ // attributes then we still want to set the TSD in userspace.
if ((flags & _PTHREAD_SET_SELF_QOS_FLAG) != 0) {
if (rv == 0 || errno == ENOENT) {
- _pthread_setspecific_direct(_PTHREAD_TSD_SLOT_PTHREAD_QOS_CLASS, priority);
+ _pthread_setspecific_direct(_PTHREAD_TSD_SLOT_PTHREAD_QOS_CLASS,
+ priority);
}
}
int
pthread_set_fixedpriority_self(void)
{
- if (!(__pthread_supported_features & PTHREAD_FEATURE_BSDTHREADCTL)) {
- return ENOTSUP;
- }
-
- if (__pthread_supported_features & PTHREAD_FEATURE_SETSELF) {
- return _pthread_set_properties_self(_PTHREAD_SET_SELF_FIXEDPRIORITY_FLAG, 0, 0);
- } else {
- return ENOTSUP;
- }
+ return _pthread_set_properties_self(_PTHREAD_SET_SELF_FIXEDPRIORITY_FLAG, 0, 0);
+}
+
+int
+pthread_set_timeshare_self(void)
+{
+ return _pthread_set_properties_self(_PTHREAD_SET_SELF_TIMESHARE_FLAG, 0, 0);
+}
+
+int
+pthread_prefer_alternate_amx_self(void)
+{
+ return _pthread_set_properties_self(_PTHREAD_SET_SELF_ALTERNATE_AMX, 0, 0);
}
pthread_override_t
-pthread_override_qos_class_start_np(pthread_t __pthread, qos_class_t __qos_class, int __relative_priority)
+pthread_override_qos_class_start_np(pthread_t thread, qos_class_t qc, int relpri)
{
pthread_override_t rv;
kern_return_t kr;
+ thread_qos_t qos;
int res = 0;
/* For now, we don't have access to malloc. So we'll have to vm_allocate this, which means the tiny struct is going
*/
bool did_malloc = true;
+ qos = _pthread_validate_qos_class_and_relpri(qc, relpri);
+ if (qos == THREAD_QOS_UNSPECIFIED) {
+ return (_Nonnull pthread_override_t)NULL;
+ }
+
mach_vm_address_t vm_addr = malloc(sizeof(struct pthread_override_s));
if (!vm_addr) {
vm_addr = vm_page_size;
did_malloc = false;
- kr = mach_vm_allocate(mach_task_self(), &vm_addr, round_page(sizeof(struct pthread_override_s)), VM_MAKE_TAG(VM_MEMORY_LIBDISPATCH) | VM_FLAGS_ANYWHERE);
+ kr = mach_vm_allocate(mach_task_self(), &vm_addr,
+ round_page(sizeof(struct pthread_override_s)),
+ VM_MAKE_TAG(VM_MEMORY_LIBDISPATCH) | VM_FLAGS_ANYWHERE);
if (kr != KERN_SUCCESS) {
errno = ENOMEM;
- return NULL;
+ return (_Nonnull pthread_override_t)NULL;
}
}
rv = (pthread_override_t)vm_addr;
rv->sig = PTHREAD_OVERRIDE_SIGNATURE;
- rv->pthread = __pthread;
- rv->kthread = pthread_mach_thread_np(__pthread);
- rv->priority = _pthread_priority_make_newest(__qos_class, __relative_priority, 0);
+ rv->pthread = thread;
+ rv->kthread = pthread_mach_thread_np(thread);
+ rv->priority = _pthread_priority_make_from_thread_qos(qos, relpri, 0);
rv->malloced = did_malloc;
/* To ensure that the kernel port that we keep stays valid, we retain it here. */
}
if (res == 0) {
- res = __bsdthread_ctl(BSDTHREAD_CTL_QOS_OVERRIDE_START, rv->kthread, rv->priority, 0);
+ res = __bsdthread_ctl(BSDTHREAD_CTL_QOS_OVERRIDE_START, rv->kthread, rv->priority, (uintptr_t)rv);
if (res != 0) {
mach_port_mod_refs(mach_task_self(), rv->kthread, MACH_PORT_RIGHT_SEND, -1);
}
rv = NULL;
}
- return rv;
+ return (_Nonnull pthread_override_t)rv;
}
int
int res = 0;
/* Double-free is a fault. Swap the signature and check the old one. */
- if (__sync_swap(&override->sig, PTHREAD_OVERRIDE_SIG_DEAD) != PTHREAD_OVERRIDE_SIGNATURE) {
+ if (_pthread_atomic_xchg_uint32_relaxed(&override->sig, PTHREAD_OVERRIDE_SIG_DEAD) != PTHREAD_OVERRIDE_SIGNATURE) {
__builtin_trap();
}
- override->sig = PTHREAD_OVERRIDE_SIG_DEAD;
-
/* Always consumes (and deallocates) the pthread_override_t object given. */
- res = __bsdthread_ctl(BSDTHREAD_CTL_QOS_OVERRIDE_END, override->kthread, 0, 0);
+ res = __bsdthread_ctl(BSDTHREAD_CTL_QOS_OVERRIDE_END, override->kthread, (uintptr_t)override, 0);
if (res == -1) { res = errno; }
/* EFAULT from the syscall means we underflowed. Crash here. */
}
int
-_pthread_override_qos_class_start_direct(mach_port_t thread, pthread_priority_t priority)
+_pthread_qos_override_start_direct(mach_port_t thread, pthread_priority_t priority, void *resource)
{
- int res = __bsdthread_ctl(BSDTHREAD_CTL_QOS_OVERRIDE_START, thread, priority, 0);
+ int res = __bsdthread_ctl(BSDTHREAD_CTL_QOS_OVERRIDE_START, thread, priority, (uintptr_t)resource);
if (res == -1) { res = errno; }
return res;
}
int
-_pthread_override_qos_class_end_direct(mach_port_t thread)
+_pthread_qos_override_end_direct(mach_port_t thread, void *resource)
{
- int res = __bsdthread_ctl(BSDTHREAD_CTL_QOS_OVERRIDE_END, thread, 0, 0);
+ int res = __bsdthread_ctl(BSDTHREAD_CTL_QOS_OVERRIDE_END, thread, (uintptr_t)resource, 0);
if (res == -1) { res = errno; }
return res;
}
+int
+_pthread_override_qos_class_start_direct(mach_port_t thread, pthread_priority_t priority)
+{
+ // use pthread_self as the default per-thread memory allocation to track the override in the kernel
+ return _pthread_qos_override_start_direct(thread, priority, pthread_self());
+}
+
+int
+_pthread_override_qos_class_end_direct(mach_port_t thread)
+{
+ // use pthread_self as the default per-thread memory allocation to track the override in the kernel
+ return _pthread_qos_override_end_direct(thread, pthread_self());
+}
+
int
_pthread_workqueue_override_start_direct(mach_port_t thread, pthread_priority_t priority)
{
return res;
}
+int
+_pthread_workqueue_override_start_direct_check_owner(mach_port_t thread, pthread_priority_t priority, mach_port_t *ulock_addr)
+{
+#if !TARGET_OS_IPHONE
+ static boolean_t kernel_supports_owner_check = TRUE;
+ if (!kernel_supports_owner_check) {
+ ulock_addr = NULL;
+ }
+#endif
+
+ for (;;) {
+ int res = __bsdthread_ctl(BSDTHREAD_CTL_QOS_OVERRIDE_DISPATCH, thread, priority, ulock_addr);
+ if (res == -1) { res = errno; }
+#if !TARGET_OS_IPHONE
+ if (ulock_addr && res == EINVAL) {
+ if ((uintptr_t)ulock_addr % _Alignof(_Atomic uint32_t)) {
+ // do not mute bad ulock addresses related errors
+ return EINVAL;
+ }
+ // backward compatibility for the XBS chroot
+ // BSDTHREAD_CTL_QOS_OVERRIDE_DISPATCH used to return EINVAL if
+ // arg3 was non NULL.
+ kernel_supports_owner_check = FALSE;
+ ulock_addr = NULL;
+ continue;
+ }
+#endif
+ if (ulock_addr && res == EFAULT) {
+ // kernel wants us to redrive the call, so while we refault the
+ // memory, also revalidate the owner
+ uint32_t uval = *(uint32_t volatile *)ulock_addr;
+ if (ulock_owner_value_to_port_name(uval) != thread) {
+ return ESTALE;
+ }
+ continue;
+ }
+
+ return res;
+ }
+}
+
int
_pthread_workqueue_override_reset(void)
{
return res;
}
+int
+_pthread_workqueue_asynchronous_override_add(mach_port_t thread, pthread_priority_t priority, void *resource)
+{
+ int res = __bsdthread_ctl(BSDTHREAD_CTL_QOS_DISPATCH_ASYNCHRONOUS_OVERRIDE_ADD, thread, priority, (uintptr_t)resource);
+ if (res == -1) { res = errno; }
+ return res;
+}
+
+int
+_pthread_workqueue_asynchronous_override_reset_self(void *resource)
+{
+ int res = __bsdthread_ctl(BSDTHREAD_CTL_QOS_DISPATCH_ASYNCHRONOUS_OVERRIDE_RESET,
+ 0 /* !reset_all */,
+ (uintptr_t)resource,
+ 0);
+ if (res == -1) { res = errno; }
+ return res;
+}
+
+int
+_pthread_workqueue_asynchronous_override_reset_all_self(void)
+{
+ int res = __bsdthread_ctl(BSDTHREAD_CTL_QOS_DISPATCH_ASYNCHRONOUS_OVERRIDE_RESET,
+ 1 /* reset_all */,
+ 0,
+ 0);
+ if (res == -1) { res = errno; }
+ return res;
+}
+
+static inline uint16_t
+_pthread_workqueue_parallelism_for_priority(int qos, unsigned long flags)
+{
+ int rc = __bsdthread_ctl(BSDTHREAD_CTL_QOS_MAX_PARALLELISM, qos, flags, 0);
+ if (os_unlikely(rc == -1)) {
+ rc = errno;
+ if (rc != EINVAL) {
+ PTHREAD_INTERNAL_CRASH(rc, "qos_max_parallelism failed");
+ }
+ if (flags & _PTHREAD_QOS_PARALLELISM_COUNT_LOGICAL) {
+ return *(uint8_t *)_COMM_PAGE_LOGICAL_CPUS;
+ } else {
+ return *(uint8_t *)_COMM_PAGE_PHYSICAL_CPUS;
+ }
+ }
+ return (uint16_t)rc;
+}
+
+int
+pthread_qos_max_parallelism(qos_class_t qos, unsigned long flags)
+{
+ thread_qos_t thread_qos;
+ if (qos == QOS_CLASS_UNSPECIFIED) {
+ qos = QOS_CLASS_DEFAULT; // <rdar://problem/35080198>
+ }
+ thread_qos = _pthread_qos_class_to_thread_qos(qos);
+ if (thread_qos == THREAD_QOS_UNSPECIFIED) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ unsigned long syscall_flags = _PTHREAD_QOS_PARALLELISM_COUNT_LOGICAL;
+ uint16_t *ptr = &_pthread_globals()->qmp_logical[thread_qos];
+
+ if (flags & PTHREAD_MAX_PARALLELISM_PHYSICAL) {
+ syscall_flags = 0;
+ ptr = &_pthread_globals()->qmp_physical[thread_qos];
+ }
+ if (*ptr == 0) {
+ *ptr = _pthread_workqueue_parallelism_for_priority(thread_qos, syscall_flags);
+ }
+ return *ptr;
+}
+
+int
+pthread_time_constraint_max_parallelism(unsigned long flags)
+{
+ unsigned long syscall_flags = _PTHREAD_QOS_PARALLELISM_COUNT_LOGICAL;
+ uint16_t *ptr = &_pthread_globals()->qmp_logical[0];
+
+ if (flags & PTHREAD_MAX_PARALLELISM_PHYSICAL) {
+ syscall_flags = 0;
+ ptr = &_pthread_globals()->qmp_physical[0];
+ }
+ if (*ptr == 0) {
+ *ptr = _pthread_workqueue_parallelism_for_priority(0,
+ syscall_flags | _PTHREAD_QOS_PARALLELISM_REALTIME);
+ }
+ return *ptr;
+}
+
int
posix_spawnattr_set_qos_class_np(posix_spawnattr_t * __restrict __attr, qos_class_t __qos_class)
{
projects / apple / libpthread.git / blobdiff