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-rw-r--r--erts/lib_src/win/ethread.c586
1 files changed, 586 insertions, 0 deletions
diff --git a/erts/lib_src/win/ethread.c b/erts/lib_src/win/ethread.c
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index 0000000000..789a360b11
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+++ b/erts/lib_src/win/ethread.c
@@ -0,0 +1,586 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 2010. All Rights Reserved.
+ *
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * %CopyrightEnd%
+ */
+
+/*
+ * Description: Windows native threads implementation of the ethread library
+ * Author: Rickard Green
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#define ETHR_CHILD_WAIT_SPIN_COUNT 4000
+
+#undef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <process.h>
+#include <winerror.h>
+#include <stdio.h>
+#include <limits.h>
+
+#define ETHR_INLINE_FUNC_NAME_(X) X ## __
+#define ETHREAD_IMPL__
+
+#include "ethread.h"
+#include "ethr_internal.h"
+
+#ifndef ETHR_HAVE_ETHREAD_DEFINES
+#error Missing configure defines
+#endif
+
+/* Argument passed to thr_wrapper() */
+typedef struct {
+ ethr_tid *tid;
+ ethr_atomic32_t result;
+ ethr_ts_event *tse;
+ void *(*thr_func)(void *);
+ void *arg;
+ void *prep_func_res;
+} ethr_thr_wrap_data__;
+
+#define ETHR_INVALID_TID_ID -1
+
+struct ethr_join_data_ {
+ HANDLE handle;
+ void *res;
+};
+
+static ethr_atomic_t thread_id_counter;
+static DWORD own_tid_key;
+static ethr_tid main_thr_tid;
+static int child_wait_spin_count;
+
+DWORD ethr_ts_event_key__;
+
+#define ETHR_GET_OWN_TID__ ((ethr_tid *) TlsGetValue(own_tid_key))
+
+/*
+ * --------------------------------------------------------------------------
+ * Static functions
+ * --------------------------------------------------------------------------
+ */
+
+static void thr_exit_cleanup(ethr_tid *tid, void *res)
+{
+
+ ETHR_ASSERT(tid == ETHR_GET_OWN_TID__);
+
+ if (tid->jdata)
+ tid->jdata->res = res;
+
+ ethr_run_exit_handlers__();
+ ethr_ts_event_destructor__((void *) ethr_get_tse__());
+}
+
+static unsigned __stdcall thr_wrapper(LPVOID vtwd)
+{
+ ethr_tid my_tid;
+ ethr_sint32_t result;
+ void *res;
+ ethr_thr_wrap_data__ *twd = (ethr_thr_wrap_data__ *) vtwd;
+ void *(*thr_func)(void *) = twd->thr_func;
+ void *arg = twd->arg;
+ ethr_ts_event *tsep = NULL;
+
+ result = (ethr_sint32_t) ethr_make_ts_event__(&tsep);
+
+ if (result == 0) {
+ tsep->iflgs |= ETHR_TS_EV_ETHREAD;
+ my_tid = *twd->tid;
+ if (!TlsSetValue(own_tid_key, (LPVOID) &my_tid)) {
+ result = (ethr_sint32_t) ethr_win_get_errno__();
+ ethr_free_ts_event__(tsep);
+ }
+ else {
+ if (ethr_thr_child_func__)
+ ethr_thr_child_func__(twd->prep_func_res);
+ }
+ }
+
+ tsep = twd->tse; /* We aren't allowed to follow twd after
+ result has been set! */
+
+ ethr_atomic32_set(&twd->result, result);
+
+ ethr_event_set(&tsep->event);
+
+ res = result == 0 ? (*thr_func)(arg) : NULL;
+
+ thr_exit_cleanup(&my_tid, res);
+ return 0;
+}
+
+/* internal exports */
+
+int
+ethr_win_get_errno__(void)
+{
+ return erts_get_last_win_errno();
+}
+
+int ethr_set_tse__(ethr_ts_event *tsep)
+{
+ return (TlsSetValue(ethr_ts_event_key__, (LPVOID) tsep)
+ ? 0
+ : ethr_win_get_errno__());
+}
+
+ethr_ts_event *ethr_get_tse__(void)
+{
+ return (ethr_ts_event *) TlsGetValue(ethr_ts_event_key__);
+}
+
+ETHR_IMPL_NORETURN__
+ethr_abort__(void)
+{
+#if 1
+ DebugBreak();
+#else
+ abort();
+#endif
+}
+
+/*
+ * ----------------------------------------------------------------------------
+ * Exported functions
+ * ----------------------------------------------------------------------------
+ */
+
+int
+ethr_init(ethr_init_data *id)
+{
+#ifdef _WIN32_WINNT
+ DWORD major = (_WIN32_WINNT >> 8) & 0xff;
+ DWORD minor = _WIN32_WINNT & 0xff;
+ OSVERSIONINFO os_version;
+#endif
+ int err = 0;
+ unsigned long i;
+
+ if (!ethr_not_inited__)
+ return EINVAL;
+
+#ifdef _WIN32_WINNT
+ os_version.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
+ GetVersionEx(&os_version);
+ if (os_version.dwPlatformId != VER_PLATFORM_WIN32_NT
+ || os_version.dwMajorVersion < major
+ || (os_version.dwMajorVersion == major
+ && os_version.dwMinorVersion < minor))
+ return ENOTSUP;
+#endif
+ err = ethr_init_common__(id);
+ if (err)
+ goto error;
+
+ own_tid_key = TlsAlloc();
+ if (own_tid_key == TLS_OUT_OF_INDEXES)
+ goto error;
+
+ ethr_atomic_init(&thread_id_counter, 0);
+
+ main_thr_tid.id = 0;
+ main_thr_tid.jdata = NULL;
+
+ if (!TlsSetValue(own_tid_key, (LPVOID) &main_thr_tid))
+ goto error;
+
+ ETHR_ASSERT(&main_thr_tid == ETHR_GET_OWN_TID__);
+
+ ethr_ts_event_key__ = TlsAlloc();
+ if (ethr_ts_event_key__ == TLS_OUT_OF_INDEXES)
+ goto error;
+
+ child_wait_spin_count = ETHR_CHILD_WAIT_SPIN_COUNT;
+ if (erts_get_cpu_configured(ethr_cpu_info__) == 1)
+ child_wait_spin_count = 0;
+
+ ethr_not_inited__ = 0;
+
+ return 0;
+
+ error:
+ ethr_not_inited__ = 1;
+ if (err == 0)
+ err = ethr_win_get_errno__();
+ ETHR_ASSERT(err != 0);
+ return err;
+}
+
+int
+ethr_late_init(ethr_late_init_data *id)
+{
+ int res = ethr_late_init_common__(id);
+ if (res != 0)
+ return res;
+ ethr_not_completely_inited__ = 0;
+ return res;
+}
+
+
+/*
+ * Thread functions.
+ */
+
+int
+ethr_thr_create(ethr_tid *tid, void * (*func)(void *), void *arg,
+ ethr_thr_opts *opts)
+{
+ HANDLE handle = INVALID_HANDLE_VALUE;
+ int err = 0;
+ ethr_thr_wrap_data__ twd;
+ DWORD code;
+ unsigned ID;
+ unsigned stack_size = 0; /* 0 = system default */
+ int use_stack_size = (opts && opts->suggested_stack_size >= 0
+ ? opts->suggested_stack_size
+ : -1 /* Use system default */);
+
+#ifdef ETHR_MODIFIED_DEFAULT_STACK_SIZE
+ if (use_stack_size < 0)
+ use_stack_size = ETHR_MODIFIED_DEFAULT_STACK_SIZE;
+#endif
+
+#if ETHR_XCHK
+ if (ethr_not_completely_inited__) {
+ ETHR_ASSERT(0);
+ return EACCES;
+ }
+ if (!tid || !func) {
+ ETHR_ASSERT(0);
+ return EINVAL;
+ }
+#endif
+
+ do {
+ tid->id = ethr_atomic_inc_read(&thread_id_counter);
+ } while (tid->id == ETHR_INVALID_TID_ID);
+
+ if (opts && opts->detached)
+ tid->jdata = NULL;
+ else {
+ tid->jdata = ethr_mem__.std.alloc(sizeof(struct ethr_join_data_));
+ if (!tid->jdata)
+ return ENOMEM;
+ tid->jdata->handle = INVALID_HANDLE_VALUE;
+ tid->jdata->res = NULL;
+ }
+
+ if (use_stack_size >= 0) {
+ size_t suggested_stack_size = (size_t) use_stack_size;
+#ifdef ETHR_DEBUG
+ suggested_stack_size /= 2; /* Make sure we got margin */
+#endif
+ if (suggested_stack_size < ethr_min_stack_size__)
+ stack_size = (unsigned) ETHR_KW2B(ethr_min_stack_size__);
+ else if (suggested_stack_size > ethr_max_stack_size__)
+ stack_size = (unsigned) ETHR_KW2B(ethr_max_stack_size__);
+ else
+ stack_size = (unsigned)
+ ETHR_PAGE_ALIGN(ETHR_KW2B(suggested_stack_size));
+ }
+
+ ethr_atomic32_init(&twd.result, -1);
+
+ twd.tid = tid;
+ twd.thr_func = func;
+ twd.arg = arg;
+ twd.tse = ethr_get_ts_event();
+
+ /* Call prepare func if it exist */
+ if (ethr_thr_prepare_func__)
+ twd.prep_func_res = ethr_thr_prepare_func__();
+ else
+ twd.prep_func_res = NULL;
+
+ /* spawn the thr_wrapper function */
+ handle = (HANDLE) _beginthreadex(NULL, stack_size, thr_wrapper,
+ (LPVOID) &twd, 0, &ID);
+ if (handle == (HANDLE) 0) {
+ handle = INVALID_HANDLE_VALUE;
+ goto error;
+ }
+ else {
+ int spin_count = child_wait_spin_count;
+
+ ETHR_ASSERT(handle != INVALID_HANDLE_VALUE);
+
+ if (!tid->jdata)
+ CloseHandle(handle);
+ else
+ tid->jdata->handle = handle;
+
+ /* Wait for child to initialize... */
+ while (1) {
+ ethr_sint32_t result;
+ int err;
+ ethr_event_reset(&twd.tse->event);
+
+ result = ethr_atomic32_read(&twd.result);
+ if (result == 0)
+ break;
+
+ if (result > 0) {
+ err = (int) result;
+ goto error;
+ }
+
+ err = ethr_event_swait(&twd.tse->event, spin_count);
+ if (err && err != EINTR)
+ goto error;
+ spin_count = 0;
+ }
+ }
+
+ if (ethr_thr_parent_func__)
+ ethr_thr_parent_func__(twd.prep_func_res);
+
+ if (twd.tse)
+ ethr_leave_ts_event(twd.tse);
+
+ return 0;
+
+ error:
+
+ if (err == 0)
+ err = ethr_win_get_errno__();
+ ETHR_ASSERT(err != 0);
+
+ if (ethr_thr_parent_func__)
+ ethr_thr_parent_func__(twd.prep_func_res);
+
+ if (handle != INVALID_HANDLE_VALUE) {
+ WaitForSingleObject(handle, INFINITE);
+ CloseHandle(handle);
+ }
+
+ if (tid->jdata) {
+ ethr_mem__.std.free(tid->jdata);
+ tid->jdata = NULL;
+ }
+
+ tid->id = ETHR_INVALID_TID_ID;
+
+ if (twd.tse)
+ ethr_leave_ts_event(twd.tse);
+
+ return err;
+}
+
+int ethr_thr_join(ethr_tid tid, void **res)
+{
+ DWORD code;
+
+#if ETHR_XCHK
+ if (ethr_not_inited__) {
+ ETHR_ASSERT(0);
+ return EACCES;
+ }
+#endif
+
+ if (tid.id == ETHR_INVALID_TID_ID || !tid.jdata)
+ return EINVAL;
+
+ /* Wait for thread to terminate */
+ code = WaitForSingleObject(tid.jdata->handle, INFINITE);
+ if (code != WAIT_OBJECT_0)
+ return ethr_win_get_errno__();
+
+ CloseHandle(tid.jdata->handle);
+ tid.jdata->handle = INVALID_HANDLE_VALUE;
+
+ if (res)
+ *res = tid.jdata->res;
+
+ /*
+ * User better not try to join or detach again; or
+ * bad things will happen... (users responsibility)
+ */
+
+ ethr_mem__.std.free(tid.jdata);
+
+ return 0;
+}
+
+
+int
+ethr_thr_detach(ethr_tid tid)
+{
+#if ETHR_XCHK
+ if (ethr_not_inited__) {
+ ETHR_ASSERT(0);
+ return EACCES;
+ }
+#endif
+
+ if (tid.id == ETHR_INVALID_TID_ID || !tid.jdata)
+ return EINVAL;
+
+ CloseHandle(tid.jdata->handle);
+ tid.jdata->handle = INVALID_HANDLE_VALUE;
+
+ /*
+ * User better not try to join or detach again; or
+ * bad things will happen... (users responsibility)
+ */
+
+ ethr_mem__.std.free(tid.jdata);
+
+ return 0;
+}
+
+
+void
+ethr_thr_exit(void *res)
+{
+ ethr_tid *tid;
+#if ETHR_XCHK
+ if (ethr_not_inited__) {
+ ETHR_ASSERT(0);
+ return;
+ }
+#endif
+ tid = ETHR_GET_OWN_TID__;
+ if (!tid) {
+ ETHR_ASSERT(0);
+ _endthreadex((unsigned) 0);
+ }
+ thr_exit_cleanup(tid, res);
+ _endthreadex((unsigned) 0);
+}
+
+ethr_tid
+ethr_self(void)
+{
+ ethr_tid *tid;
+#if ETHR_XCHK
+ if (ethr_not_inited__) {
+ ethr_tid dummy_tid = {ETHR_INVALID_TID_ID, NULL};
+ ETHR_ASSERT(0);
+ return dummy_tid;
+ }
+#endif
+ /* It is okay for non-ethreads (i.e. native win32 threads) to call
+ ethr_self(). They will however be returned an invalid tid. */
+ tid = ETHR_GET_OWN_TID__;
+ if (!tid) {
+ ethr_tid dummy_tid = {ETHR_INVALID_TID_ID, NULL};
+ return dummy_tid;
+ }
+ return *tid;
+}
+
+int
+ethr_equal_tids(ethr_tid tid1, ethr_tid tid2)
+{
+ /* An invalid tid does not equal any tid, not even an invalid tid */
+ return tid1.id == tid2.id && tid1.id != ETHR_INVALID_TID_ID;
+}
+
+/*
+ * Thread specific data
+ */
+
+int
+ethr_tsd_key_create(ethr_tsd_key *keyp)
+{
+ DWORD key;
+#if ETHR_XCHK
+ if (ethr_not_inited__) {
+ ETHR_ASSERT(0);
+ return EACCES;
+ }
+ if (!keyp) {
+ ETHR_ASSERT(0);
+ return EINVAL;
+ }
+#endif
+ key = TlsAlloc();
+ if (key == TLS_OUT_OF_INDEXES)
+ return ethr_win_get_errno__();
+ *keyp = (ethr_tsd_key) key;
+ return 0;
+}
+
+int
+ethr_tsd_key_delete(ethr_tsd_key key)
+{
+#if ETHR_XCHK
+ if (ethr_not_inited__) {
+ ETHR_ASSERT(0);
+ return EACCES;
+ }
+#endif
+ if (!TlsFree((DWORD) key))
+ return ethr_win_get_errno__();
+ return 0;
+}
+
+int
+ethr_tsd_set(ethr_tsd_key key, void *value)
+{
+#if ETHR_XCHK
+ if (ethr_not_inited__) {
+ ETHR_ASSERT(0);
+ return EACCES;
+ }
+#endif
+ if (!TlsSetValue((DWORD) key, (LPVOID) value))
+ return ethr_win_get_errno__();
+ return 0;
+}
+
+void *
+ethr_tsd_get(ethr_tsd_key key)
+{
+#if ETHR_XCHK
+ if (ethr_not_inited__) {
+ ETHR_ASSERT(0);
+ return NULL;
+ }
+#endif
+ return (void *) TlsGetValue((DWORD) key);
+}
+
+
+/*
+ * Thread specific events
+ */
+
+ethr_ts_event *
+ethr_get_ts_event(void)
+{
+ return ethr_get_ts_event__();
+}
+
+void
+ethr_leave_ts_event(ethr_ts_event *tsep)
+{
+ ethr_leave_ts_event__(tsep);
+}
+
+ethr_ts_event *
+ethr_create_ts_event__(void)
+{
+ ethr_ts_event *tsep;
+ ethr_make_ts_event__(&tsep);
+ return tsep;
+}