rt: Rename rust_scheduler to rust_task_thread

1 files changed, 0 insertions, 372 deletions

diff --git a/src/rt/rust_scheduler.cpp b/src/rt/rust_scheduler.cpp
deleted file mode 100644
index 4262c34c6dc..00000000000
--- a/src/rt/rust_scheduler.cpp
+++ /dev/null
@@ -1,372 +0,0 @@
-
-#include <stdarg.h>
-#include <cassert>
-#include <pthread.h>
-#include "rust_internal.h"
-#include "rust_util.h"
-#include "globals.h"
-
-#ifndef _WIN32
-pthread_key_t rust_scheduler::task_key;
-#else
-DWORD rust_scheduler::task_key;
-#endif
-
-bool rust_scheduler::tls_initialized = false;
-
-rust_scheduler::rust_scheduler(rust_kernel *kernel,
-                               rust_srv *srv,
-                               int id) :
-    ref_count(1),
-    _log(srv, this),
-    log_lvl(log_debug),
-    srv(srv),
-    // TODO: calculate a per scheduler name.
-    name("main"),
-    newborn_tasks(this, "newborn"),
-    running_tasks(this, "running"),
-    blocked_tasks(this, "blocked"),
-    dead_tasks(this, "dead"),
-    cache(this),
-    kernel(kernel),
-    id(id),
-    min_stack_size(kernel->env->min_stack_size),
-    env(kernel->env),
-    should_exit(false)
-{
-    LOGPTR(this, "new dom", (uintptr_t)this);
-    isaac_init(this, &rctx);
-#ifndef __WIN32__
-    pthread_attr_init(&attr);
-    pthread_attr_setstacksize(&attr, 1024 * 1024);
-    pthread_attr_setdetachstate(&attr, true);
-#endif
-
-    if (!tls_initialized)
-        init_tls();
-}
-
-rust_scheduler::~rust_scheduler() {
-    DLOG(this, dom, "~rust_scheduler %s @0x%" PRIxPTR, name, (uintptr_t)this);
-
-    newborn_tasks.delete_all();
-    running_tasks.delete_all();
-    blocked_tasks.delete_all();
-    dead_tasks.delete_all();
-#ifndef __WIN32__
-    pthread_attr_destroy(&attr);
-#endif
-}
-
-void
-rust_scheduler::activate(rust_task *task) {
-    task->ctx.next = &c_context;
-    DLOG(this, task, "descheduling...");
-    lock.unlock();
-    task->ctx.swap(c_context);
-    lock.lock();
-    DLOG(this, task, "task has returned");
-}
-
-void
-rust_scheduler::log(rust_task* task, uint32_t level, char const *fmt, ...) {
-    char buf[BUF_BYTES];
-    va_list args;
-    va_start(args, fmt);
-    vsnprintf(buf, sizeof(buf), fmt, args);
-    _log.trace_ln(task, level, buf);
-    va_end(args);
-}
-
-void
-rust_scheduler::fail() {
-    log(NULL, log_err, "domain %s @0x%" PRIxPTR " root task failed",
-        name, this);
-    kernel->fail();
-}
-
-void
-rust_scheduler::kill_all_tasks() {
-    I(this, !lock.lock_held_by_current_thread());
-    scoped_lock with(lock);
-
-    for (size_t i = 0; i < running_tasks.length(); i++) {
-        // We don't want the failure of these tasks to propagate back
-        // to the kernel again since we're already failing everything
-        running_tasks[i]->unsupervise();
-        running_tasks[i]->kill();
-    }
-
-    for (size_t i = 0; i < blocked_tasks.length(); i++) {
-        blocked_tasks[i]->unsupervise();
-        blocked_tasks[i]->kill();
-    }
-}
-
-size_t
-rust_scheduler::number_of_live_tasks() {
-    return running_tasks.length() + blocked_tasks.length();
-}
-
-/**
- * Delete any dead tasks.
- */
-void
-rust_scheduler::reap_dead_tasks() {
-    I(this, lock.lock_held_by_current_thread());
-    if (dead_tasks.length() == 0) {
-        return;
-    }
-
-    // First make a copy of the dead_task list with the lock held
-    size_t dead_tasks_len = dead_tasks.length();
-    rust_task **dead_tasks_copy = (rust_task**)
-        srv->malloc(sizeof(rust_task*) * dead_tasks_len);
-    for (size_t i = 0; i < dead_tasks_len; ++i) {
-        dead_tasks_copy[i] = dead_tasks.pop_value();
-    }
-
-    // Now unlock again because we have to actually free the dead tasks,
-    // and that may end up wanting to lock the kernel lock. We have
-    // a kernel lock -> scheduler lock locking order that we need
-    // to maintain.
-    lock.unlock();
-
-    for (size_t i = 0; i < dead_tasks_len; ++i) {
-        rust_task *task = dead_tasks_copy[i];
-        if (task) {
-            task->deref();
-            int live_tasks = sync::decrement(kernel->live_tasks);
-            if (live_tasks == 0) {
-                // There are no more tasks and there never will be.
-                // Tell all the schedulers to exit.
-                kernel->exit_schedulers();
-            }
-        }
-    }
-    srv->free(dead_tasks_copy);
-
-    lock.lock();
-}
-
-/**
- * Schedules a running task for execution. Only running tasks can be
- * activated.  Blocked tasks have to be unblocked before they can be
- * activated.
- *
- * Returns NULL if no tasks can be scheduled.
- */
-rust_task *
-rust_scheduler::schedule_task() {
-    I(this, this);
-    // FIXME: in the face of failing tasks, this is not always right.
-    // I(this, n_live_tasks() > 0);
-    if (running_tasks.length() > 0) {
-        size_t k = isaac_rand(&rctx);
-        // Look around for a runnable task, starting at k.
-        for(size_t j = 0; j < running_tasks.length(); ++j) {
-            size_t  i = (j + k) % running_tasks.length();
-            return (rust_task *)running_tasks[i];
-        }
-    }
-    return NULL;
-}
-
-void
-rust_scheduler::log_state() {
-    if (log_rt_task < log_debug) return;
-
-    if (!running_tasks.is_empty()) {
-        log(NULL, log_debug, "running tasks:");
-        for (size_t i = 0; i < running_tasks.length(); i++) {
-            log(NULL, log_debug, "\t task: %s @0x%" PRIxPTR,
-                running_tasks[i]->name,
-                running_tasks[i]);
-        }
-    }
-
-    if (!blocked_tasks.is_empty()) {
-        log(NULL, log_debug, "blocked tasks:");
-        for (size_t i = 0; i < blocked_tasks.length(); i++) {
-            log(NULL, log_debug, "\t task: %s @0x%" PRIxPTR ", blocked on: 0x%"
-                PRIxPTR " '%s'",
-                blocked_tasks[i]->name, blocked_tasks[i],
-                blocked_tasks[i]->cond, blocked_tasks[i]->cond_name);
-        }
-    }
-
-    if (!dead_tasks.is_empty()) {
-        log(NULL, log_debug, "dead tasks:");
-        for (size_t i = 0; i < dead_tasks.length(); i++) {
-            log(NULL, log_debug, "\t task: %s 0x%" PRIxPTR,
-                dead_tasks[i]->name, dead_tasks[i]);
-        }
-    }
-}
-/**
- * Starts the main scheduler loop which performs task scheduling for this
- * domain.
- *
- * Returns once no more tasks can be scheduled and all task ref_counts
- * drop to zero.
- */
-void
-rust_scheduler::start_main_loop() {
-    lock.lock();
-
-    DLOG(this, dom, "started domain loop %d", id);
-
-    while (!should_exit) {
-        A(this, kernel->is_deadlocked() == false, "deadlock");
-
-        DLOG(this, dom, "worker %d, number_of_live_tasks = %d, total = %d",
-             id, number_of_live_tasks(), kernel->live_tasks);
-
-        rust_task *scheduled_task = schedule_task();
-
-        if (scheduled_task == NULL) {
-            log_state();
-            DLOG(this, task,
-                 "all tasks are blocked, scheduler id %d yielding ...",
-                 id);
-            lock.wait();
-            reap_dead_tasks();
-            DLOG(this, task,
-                 "scheduler %d resuming ...", id);
-            continue;
-        }
-
-        I(this, scheduled_task->running());
-
-        DLOG(this, task,
-             "activating task %s 0x%" PRIxPTR
-             ", sp=0x%" PRIxPTR
-             ", state: %s",
-             scheduled_task->name,
-             (uintptr_t)scheduled_task,
-             scheduled_task->user.rust_sp,
-             scheduled_task->state->name);
-
-        place_task_in_tls(scheduled_task);
-
-        DLOG(this, task,
-             "Running task %p on worker %d",
-             scheduled_task, id);
-        activate(scheduled_task);
-
-        DLOG(this, task,
-             "returned from task %s @0x%" PRIxPTR
-             " in state '%s', sp=0x%x, worker id=%d" PRIxPTR,
-             scheduled_task->name,
-             (uintptr_t)scheduled_task,
-             scheduled_task->state->name,
-             scheduled_task->user.rust_sp,
-             id);
-
-        reap_dead_tasks();
-    }
-
-    A(this, newborn_tasks.is_empty(), "Should have no newborn tasks");
-    A(this, running_tasks.is_empty(), "Should have no running tasks");
-    A(this, blocked_tasks.is_empty(), "Should have no blocked tasks");
-    A(this, dead_tasks.is_empty(), "Should have no dead tasks");
-
-    DLOG(this, dom, "finished main-loop %d", id);
-
-    lock.unlock();
-}
-
-rust_crate_cache *
-rust_scheduler::get_cache() {
-    return &cache;
-}
-
-rust_task *
-rust_scheduler::create_task(rust_task *spawner, const char *name,
-                            size_t init_stack_sz) {
-    rust_task *task =
-        new (this->kernel, "rust_task")
-        rust_task (this, &newborn_tasks, spawner, name, init_stack_sz);
-    DLOG(this, task, "created task: " PTR ", spawner: %s, name: %s",
-                        task, spawner ? spawner->name : "null", name);
-
-    {
-        scoped_lock with(lock);
-        newborn_tasks.append(task);
-    }
-
-    sync::increment(kernel->live_tasks);
-
-    return task;
-}
-
-void rust_scheduler::run() {
-    this->start_main_loop();
-}
-
-#ifndef _WIN32
-void
-rust_scheduler::init_tls() {
-    int result = pthread_key_create(&task_key, NULL);
-    assert(!result && "Couldn't create the TLS key!");
-    tls_initialized = true;
-}
-
-void
-rust_scheduler::place_task_in_tls(rust_task *task) {
-    int result = pthread_setspecific(task_key, task);
-    assert(!result && "Couldn't place the task in TLS!");
-    task->record_stack_limit();
-}
-
-rust_task *
-rust_scheduler::get_task() {
-    if (!tls_initialized)
-        return NULL;
-    rust_task *task = reinterpret_cast<rust_task *>
-        (pthread_getspecific(task_key));
-    assert(task && "Couldn't get the task from TLS!");
-    return task;
-}
-#else
-void
-rust_scheduler::init_tls() {
-    task_key = TlsAlloc();
-    assert(task_key != TLS_OUT_OF_INDEXES && "Couldn't create the TLS key!");
-    tls_initialized = true;
-}
-
-void
-rust_scheduler::place_task_in_tls(rust_task *task) {
-    BOOL result = TlsSetValue(task_key, task);
-    assert(result && "Couldn't place the task in TLS!");
-    task->record_stack_limit();
-}
-
-rust_task *
-rust_scheduler::get_task() {
-    if (!tls_initialized)
-        return NULL;
-    rust_task *task = reinterpret_cast<rust_task *>(TlsGetValue(task_key));
-    assert(task && "Couldn't get the task from TLS!");
-    return task;
-}
-#endif
-
-void
-rust_scheduler::exit() {
-    A(this, !lock.lock_held_by_current_thread(), "Shouldn't have lock");
-    scoped_lock with(lock);
-    should_exit = true;
-    lock.signal();
-}
-
-//
-// Local Variables:
-// mode: C++
-// fill-column: 70;
-// indent-tabs-mode: nil
-// c-basic-offset: 4
-// buffer-file-coding-system: utf-8-unix
-// End:
-//