1 files changed, 48 insertions, 0 deletions

diff --git a/include/nvgpu/rwsem.h b/include/nvgpu/rwsem.h
new file mode 100644
index 0000000..3cca9c5
--- /dev/null
+++ b/include/nvgpu/rwsem.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2017-2018, 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_RWSEM_H
+#define NVGPU_RWSEM_H
+
+#ifdef __KERNEL__
+#include <nvgpu/linux/rwsem.h>
+#elif defined(__NVGPU_POSIX__)
+#include <nvgpu/posix/rwsem.h>
+#else
+#include <nvgpu_rmos/include/rwsem.h>
+#endif
+
+/*
+ * struct nvgpu_rwsem
+ *
+ * Should be implemented per-OS in a separate library
+ * But implementation should adhere to rw_semaphore implementation
+ * as specified in Linux Documentation
+ */
+struct nvgpu_rwsem;
+
+void nvgpu_rwsem_init(struct nvgpu_rwsem *rwsem);
+void nvgpu_rwsem_up_read(struct nvgpu_rwsem *rwsem);
+void nvgpu_rwsem_down_read(struct nvgpu_rwsem *rwsem);
+void nvgpu_rwsem_up_write(struct nvgpu_rwsem *rwsem);
+void nvgpu_rwsem_down_write(struct nvgpu_rwsem *rwsem);
+
+#endif /* NVGPU_RWSEM_H */