Include nvgpu headers

These are needed to build on NVIDIA's Jetson boards for the time
being. Only a couple structs are required, so it should be fairly
easy to remove this dependency at some point in the future.

1 files changed, 69 insertions, 0 deletions

diff --git a/include/nvgpu/posix/lock.h b/include/nvgpu/posix/lock.h
new file mode 100644
index 0000000..82eddd0
--- /dev/null
+++ b/include/nvgpu/posix/lock.h
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+/*
+ * Copyright (c) 2017, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __NVGPU_POSIX_LOCK_H__
+#define __NVGPU_POSIX_LOCK_H__
+
+#include <stdlib.h>
+
+#include <pthread.h>
+
+/*
+ * All locks for posix nvgpu are just pthread locks. There's not a lot of reason
+ * to have real spinlocks in userspace since we aren't using real HW or running
+ * perf critical code where a sleep could be devestating.
+ *
+ * This could be revisited later, though.
+ */
+struct __nvgpu_posix_lock {
+        pthread_mutex_t mutex;
+};
+
+static inline void __nvgpu_posix_lock_acquire(struct __nvgpu_posix_lock *lock)
+{
+        pthread_mutex_lock(&lock->mutex);
+}
+
+static inline int __nvgpu_posix_lock_try_acquire(
+        struct __nvgpu_posix_lock *lock)
+{
+        return pthread_mutex_trylock(&lock->mutex);
+}
+
+static inline void __nvgpu_posix_lock_release(struct __nvgpu_posix_lock *lock)
+{
+        pthread_mutex_unlock(&lock->mutex);
+}
+
+struct nvgpu_mutex {
+        struct __nvgpu_posix_lock lock;
+};
+
+struct nvgpu_spinlock {
+        struct __nvgpu_posix_lock lock;
+};
+
+struct nvgpu_raw_spinlock {
+        struct __nvgpu_posix_lock lock;
+};
+
+#endif /* NVGPU_LOCK_LINUX_H */