1 files changed, 271 insertions, 0 deletions
diff --git a/src/rt/rust_dom.cpp b/src/rt/rust_dom.cpp
new file mode 100644
index 00000000..3b5e23b2
--- /dev/null
+++ b/src/rt/rust_dom.cpp
@@ -0,0 +1,271 @@
+
+#include <stdarg.h>
+#include "rust_internal.h"
+
+template class ptr_vec<rust_task>;
+
+rust_dom::rust_dom(rust_srv *srv, rust_crate const *root_crate) :
+    interrupt_flag(0),
+    root_crate(root_crate),
+    _log(srv, this),
+    srv(srv),
+    running_tasks(this),
+    blocked_tasks(this),
+    dead_tasks(this),
+    caches(this),
+    root_task(NULL),
+    curr_task(NULL),
+    rval(0)
+{
+    logptr("new dom", (uintptr_t)this);
+    memset(&rctx, 0, sizeof(rctx));
+
+#ifdef __WIN32__
+    {
+        HCRYPTPROV hProv;
+        win32_require
+            (_T("CryptAcquireContext"),
+             CryptAcquireContext(&hProv, NULL, NULL, PROV_RSA_FULL,
+                                 CRYPT_VERIFYCONTEXT|CRYPT_SILENT));
+        win32_require
+            (_T("CryptGenRandom"),
+             CryptGenRandom(hProv, sizeof(rctx.randrsl),
+                            (BYTE*)(&rctx.randrsl)));
+        win32_require
+            (_T("CryptReleaseContext"),
+             CryptReleaseContext(hProv, 0));
+    }
+#else
+    int fd = open("/dev/urandom", O_RDONLY);
+    I(this, fd > 0);
+    I(this, read(fd, (void*) &rctx.randrsl, sizeof(rctx.randrsl))
+      == sizeof(rctx.randrsl));
+    I(this, close(fd) == 0);
+    pthread_attr_init(&attr);
+    pthread_attr_setstacksize(&attr, 1024 * 1024);
+    pthread_attr_setdetachstate(&attr, true);
+#endif
+    randinit(&rctx, 1);
+
+    root_task = new (this) rust_task(this, NULL);
+}
+
+static void
+del_all_tasks(rust_dom *dom, ptr_vec<rust_task> *v) {
+    I(dom, v);
+    while (v->length()) {
+        dom->log(rust_log::TASK, "deleting task %" PRIdPTR, v->length() - 1);
+        delete v->pop();
+    }
+}
+
+rust_dom::~rust_dom() {
+    log(rust_log::TASK, "deleting all running tasks");
+    del_all_tasks(this, &running_tasks);
+    log(rust_log::TASK, "deleting all blocked tasks");
+    del_all_tasks(this, &blocked_tasks);
+    log(rust_log::TASK, "deleting all dead tasks");
+    del_all_tasks(this, &dead_tasks);
+#ifndef __WIN32__
+    pthread_attr_destroy(&attr);
+#endif
+    while (caches.length())
+        delete caches.pop();
+}
+
+void
+rust_dom::activate(rust_task *task) {
+    curr_task = task;
+    root_crate->get_activate_glue()(task);
+    curr_task = NULL;
+}
+
+void
+rust_dom::log(uint32_t type_bits, char const *fmt, ...) {
+    char buf[256];
+    if (_log.is_tracing(type_bits)) {
+        va_list args;
+        va_start(args, fmt);
+        vsnprintf(buf, sizeof(buf), fmt, args);
+        _log.trace_ln(type_bits, buf);
+        va_end(args);
+    }
+}
+
+rust_log &
+rust_dom::get_log() {
+    return _log;
+}
+
+void
+rust_dom::logptr(char const *msg, uintptr_t ptrval) {
+    log(rust_log::MEM, "%s 0x%" PRIxPTR, msg, ptrval);
+}
+
+template<typename T> void
+rust_dom::logptr(char const *msg, T* ptrval) {
+    log(rust_log::MEM, "%s 0x%" PRIxPTR, msg, (uintptr_t)ptrval);
+}
+
+
+void
+rust_dom::fail() {
+    log(rust_log::DOM, "domain 0x%" PRIxPTR " root task failed", this);
+    I(this, rval == 0);
+    rval = 1;
+}
+
+void *
+rust_dom::malloc(size_t sz) {
+    void *p = srv->malloc(sz);
+    I(this, p);
+    log(rust_log::MEM, "rust_dom::malloc(%d) -> 0x%" PRIxPTR,
+        sz, p);
+    return p;
+}
+
+void *
+rust_dom::calloc(size_t sz) {
+    void *p = this->malloc(sz);
+    memset(p, 0, sz);
+    return p;
+}
+
+void *
+rust_dom::realloc(void *p, size_t sz) {
+    void *p1 = srv->realloc(p, sz);
+    I(this, p1);
+    log(rust_log::MEM, "rust_dom::realloc(0x%" PRIxPTR ", %d) -> 0x%" PRIxPTR,
+        p, sz, p1);
+    return p1;
+}
+
+void
+rust_dom::free(void *p) {
+    log(rust_log::MEM, "rust_dom::free(0x%" PRIxPTR ")", p);
+    I(this, p);
+    srv->free(p);
+}
+
+#ifdef __WIN32__
+void
+rust_dom::win32_require(LPCTSTR fn, BOOL ok) {
+    if (!ok) {
+        LPTSTR buf;
+        DWORD err = GetLastError();
+        FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
+                      FORMAT_MESSAGE_FROM_SYSTEM |
+                      FORMAT_MESSAGE_IGNORE_INSERTS,
+                      NULL, err,
+                      MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+                      (LPTSTR) &buf, 0, NULL );
+        log(rust_log::ERR, "%s failed with error %ld: %s", fn, err, buf);
+        LocalFree((HLOCAL)buf);
+        I(this, ok);
+    }
+}
+#endif
+
+size_t
+rust_dom::n_live_tasks()
+{
+    return running_tasks.length() + blocked_tasks.length();
+}
+
+void
+rust_dom::add_task_to_state_vec(ptr_vec<rust_task> *v, rust_task *task)
+{
+    log(rust_log::MEM|rust_log::TASK,
+        "adding task 0x%" PRIxPTR " in state '%s' to vec 0x%" PRIxPTR,
+        (uintptr_t)task, state_vec_name(v), (uintptr_t)v);
+    v->push(task);
+}
+
+
+void
+rust_dom::remove_task_from_state_vec(ptr_vec<rust_task> *v, rust_task *task)
+{
+    log(rust_log::MEM|rust_log::TASK,
+        "removing task 0x%" PRIxPTR " in state '%s' from vec 0x%" PRIxPTR,
+        (uintptr_t)task, state_vec_name(v), (uintptr_t)v);
+    I(this, (*v)[task->idx] == task);
+    v->swapdel(task);
+}
+
+const char *
+rust_dom::state_vec_name(ptr_vec<rust_task> *v)
+{
+    if (v == &running_tasks)
+        return "running";
+    if (v == &blocked_tasks)
+        return "blocked";
+    I(this, v == &dead_tasks);
+    return "dead";
+}
+
+void
+rust_dom::reap_dead_tasks()
+{
+    for (size_t i = 0; i < dead_tasks.length(); ) {
+        rust_task *t = dead_tasks[i];
+        if (t == root_task || t->refcnt == 0) {
+            I(this, !t->waiting_tasks.length());
+            dead_tasks.swapdel(t);
+            log(rust_log::TASK,
+                "deleting unreferenced dead task 0x%" PRIxPTR, t);
+            delete t;
+            continue;
+        }
+        ++i;
+    }
+}
+
+rust_task *
+rust_dom::sched()
+{
+    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 i = rand(&rctx);
+        i %= running_tasks.length();
+        return (rust_task *)running_tasks[i];
+    }
+    log(rust_log::DOM|rust_log::TASK,
+        "no schedulable tasks");
+    return NULL;
+}
+
+rust_crate_cache *
+rust_dom::get_cache(rust_crate const *crate) {
+    log(rust_log::CACHE,
+        "looking for crate-cache for crate 0x%" PRIxPTR, crate);
+    rust_crate_cache *cache = NULL;
+    for (size_t i = 0; i < caches.length(); ++i) {
+        rust_crate_cache *c = caches[i];
+        if (c->crate == crate) {
+            cache = c;
+            break;
+        }
+    }
+    if (!cache) {
+        log(rust_log::CACHE,
+            "making new crate-cache for crate 0x%" PRIxPTR, crate);
+        cache = new (this) rust_crate_cache(this, crate);
+        caches.push(cache);
+    }
+    cache->ref();
+    return cache;
+}
+
+
+//
+// Local Variables:
+// mode: C++
+// fill-column: 70;
+// indent-tabs-mode: nil
+// c-basic-offset: 4
+// buffer-file-coding-system: utf-8-unix
+// compile-command: "make -k -C .. 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
+// End:
+//