91 lines
2.9 KiB
C++
91 lines
2.9 KiB
C++
/*
|
|
Copyright (c) 2010-2011, Intel Corporation
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are
|
|
met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
* Neither the name of Intel Corporation nor the names of its
|
|
contributors may be used to endorse or promote products derived from
|
|
this software without specific prior written permission.
|
|
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
|
|
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
|
|
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
|
|
OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/* A simple task system for ispc programs based on Apple's Grand Central
|
|
Dispatch. */
|
|
|
|
#include <dispatch/dispatch.h>
|
|
|
|
static dispatch_queue_t gcdQueue;
|
|
static dispatch_group_t gcdGroup;
|
|
|
|
// ispc expects these functions to have C linkage / not be mangled
|
|
extern "C" {
|
|
void ISPCLaunch(void *f, void *data);
|
|
void ISPCSync();
|
|
}
|
|
|
|
struct TaskInfo {
|
|
void *func;
|
|
void *data;
|
|
};
|
|
|
|
|
|
void
|
|
TasksInit() {
|
|
gcdQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
|
|
gcdGroup = dispatch_group_create();
|
|
}
|
|
|
|
|
|
static void
|
|
lRunTask(void *ti) {
|
|
typedef void (*TaskFuncType)(void *, int, int);
|
|
TaskInfo *taskInfo = (TaskInfo *)ti;
|
|
|
|
TaskFuncType func = (TaskFuncType)(taskInfo->func);
|
|
|
|
// FIXME: these are bogus values; may cause bugs in code that depends
|
|
// on them having unique values in different threads.
|
|
int threadIndex = 0;
|
|
int threadCount = 1;
|
|
// Actually run the task
|
|
func(taskInfo->data, threadIndex, threadCount);
|
|
|
|
// FIXME: taskInfo leaks...
|
|
}
|
|
|
|
|
|
void ISPCLaunch(void *func, void *data) {
|
|
TaskInfo *ti = new TaskInfo;
|
|
ti->func = func;
|
|
ti->data = data;
|
|
dispatch_group_async_f(gcdGroup, gcdQueue, ti, lRunTask);
|
|
}
|
|
|
|
|
|
void ISPCSync() {
|
|
// Wait for all of the tasks in the group to complete before returning
|
|
dispatch_group_wait(gcdGroup, DISPATCH_TIME_FOREVER);
|
|
}
|