| // Copyright 2016 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef LIB_ZX_VMO_H_ |
| #define LIB_ZX_VMO_H_ |
| |
| #include <lib/zx/handle.h> |
| #include <lib/zx/object.h> |
| #include <lib/zx/resource.h> |
| |
| namespace zx { |
| |
| class bti; |
| |
| class vmo final : public object<vmo> { |
| public: |
| static constexpr zx_obj_type_t TYPE = ZX_OBJ_TYPE_VMO; |
| |
| constexpr vmo() = default; |
| |
| explicit vmo(zx_handle_t value) : object(value) {} |
| |
| explicit vmo(handle&& h) : object(h.release()) {} |
| |
| vmo(vmo&& other) : object(other.release()) {} |
| |
| vmo& operator=(vmo&& other) { |
| reset(other.release()); |
| return *this; |
| } |
| |
| static zx_status_t create(uint64_t size, uint32_t options, vmo* result); |
| static zx_status_t create_contiguous(const bti& bti, size_t size, uint32_t alignment_log2, |
| vmo* result); |
| static zx_status_t create_physical(const resource& resource, zx_paddr_t paddr, size_t size, |
| vmo* result); |
| |
| zx_status_t read(void* data, uint64_t offset, size_t len) const { |
| return zx_vmo_read(get(), data, offset, len); |
| } |
| |
| zx_status_t write(const void* data, uint64_t offset, size_t len) const { |
| return zx_vmo_write(get(), data, offset, len); |
| } |
| |
| zx_status_t get_size(uint64_t* size) const { return zx_vmo_get_size(get(), size); } |
| |
| zx_status_t set_size(uint64_t size) const { return zx_vmo_set_size(get(), size); } |
| |
| zx_status_t create_child(uint32_t options, uint64_t offset, uint64_t size, vmo* result) const { |
| // Allow for the caller aliasing |result| to |this|. |
| vmo h; |
| zx_status_t status = |
| zx_vmo_create_child(get(), options, offset, size, h.reset_and_get_address()); |
| result->reset(h.release()); |
| return status; |
| } |
| |
| zx_status_t op_range(uint32_t op, uint64_t offset, uint64_t size, void* buffer, |
| size_t buffer_size) const { |
| return zx_vmo_op_range(get(), op, offset, size, buffer, buffer_size); |
| } |
| |
| zx_status_t set_cache_policy(uint32_t cache_policy) const { |
| return zx_vmo_set_cache_policy(get(), cache_policy); |
| } |
| |
| zx_status_t replace_as_executable(const resource& vmex, vmo* result) { |
| zx_handle_t h = ZX_HANDLE_INVALID; |
| zx_status_t status = zx_vmo_replace_as_executable(value_, vmex.get(), &h); |
| // We store ZX_HANDLE_INVALID to value_ before calling reset on result |
| // in case result == this. |
| value_ = ZX_HANDLE_INVALID; |
| result->reset(h); |
| return status; |
| } |
| }; |
| |
| using unowned_vmo = unowned<vmo>; |
| |
| } // namespace zx |
| |
| #endif // LIB_ZX_VMO_H_ |