COMMUNICATION METHOD AND APPARATUS, AND INTELLIGENT DRIVING DEVICE
Embodiments of this application provide a communication method and apparatus, and an intelligent driving device. The method includes: allocating, in a kernel, a first memory to a first process, where the first memory includes a memory used to carry identity information of the first process; filling the identity information of the first process into the first memory; and mapping the first memory to obtain a shared memory, so that a second process obtains the identity information of the first process by using the shared memory. Embodiments of this application may be applied to an intelligent vehicle or an electric vehicle, to help reduce an inter-process communication delay, and also help improve communication efficiency and certainty.
1 . A communication method, comprising:
allocating, in a kernel, a first memory to a first process, wherein the first memory comprises a memory used to carry identity information of the first process;
filling the identity information of the first process into the first memory; and
mapping the first memory to obtain a shared memory, so that a second process obtains the identity information of the first process by using the shared memory.
2 . The method according to claim 1 , wherein the identity information of the first process comprises service-based identity information of the first process.
3 . The method according to claim 2 , wherein the kernel stores a mapping relationship between abstract identity information of the first process and the service-based identity information of the first process, and the method further comprises:
obtaining the abstract identity information of the first process; and
determining the service-based identity information of the first process based on the abstract identity information of the first process and the mapping relationship.
4 . The method according to claim 3 , wherein the method further comprises:
cleaning the mapping relationship when the first process exits.
5 . The method according to claim 1 , wherein the method further comprises:
controlling visibility of the first process and the second process to the first memory based on attribute information of a virtual address page table.
6 . The method according to claim 5 , wherein the controlling visibility of the first process and the second process to the first memory based on attribute information of a virtual address page table comprises:
controlling, based on the attribute information of the virtual address page table, the first process to be invisible to the first memory and the second process to be readable and unwritable to the first memory.
7 . The method according to claim 1 , wherein the first memory further comprises a memory used to carry payload data of the first process, and the method further comprises:
filling the payload data in the shared memory, so that the second process obtains the payload data by using the shared memory.
8 . The method according to claim 1 , wherein the second process obtains the identity information of the first process based on a pointer address offset.
9 . A communication apparatus, comprising:
at least one processor; and
a memory coupled to the at least one processor and storing programming instructions for execution by the at least one processor, the programming instructions for execution by the at least one processor, the programming instructions instruct the at least one processor to perform the following operations:
allocating, in a kernel, a first memory to a first process, wherein the first memory comprises a memory used to carry identity information of the first process;
filling the identity information of the first process into the first memory; and
mapping the first memory to obtain a shared memory, so that a second process obtains the identity information of the first process by using the shared memory.
10 . The apparatus according to claim 9 , wherein the identity information of the first process comprises service-based identity information of the first process.
11 . The apparatus according to claim 10 , wherein the kernel stores a mapping relationship between abstract identity information of the first process and the service-based identity information of the first process, and the programming instructions instruct the at least one processor to perform the following operation:
obtaining the abstract identity information of the first process; and
determining the service-based identity information of the first process based on the abstract identity information of the first process and the mapping relationship.
12 . The apparatus according to claim 11 , wherein the programming instructions instruct the at least one processor to perform the following operation:
cleaning the mapping relationship when the first process exits.
13 . The apparatus according to claim 9 , wherein the programming instructions instruct the at least one processor to perform the following operation:
controlling visibility of the first process and the second process to the first memory based on attribute information of a virtual address page table.
14 . The apparatus according to claim 13 , wherein the programming instructions instruct the at least one processor to perform the following operation:
controlling, based on the attribute information of the virtual address page table, the first process to be invisible to the first memory and the second process to be readable and unwritable to the first memory.
15 . The apparatus according to claim 9 , wherein the first memory further comprises a memory used to carry payload data of the first process, and the data filling unit is further configured to:
fill the payload data in the shared memory, so that the second process obtains the payload data by using the shared memory.
16 . The apparatus according to claim 9 , wherein the second process obtains the identity information of the first process based on a pointer address offset.
17 . An intelligent driving device, comprising at least one processor and a memory, wherein the at least one processor is coupled to the memory, and is configured to read and execute instructions in the memory to perform the following operations:
allocating, in a kernel, a first memory to a first process, wherein the first memory comprises a memory used to carry identity information of the first process;
filling the identity information of the first process into the first memory; and
mapping the first memory to obtain a shared memory, so that a second process obtains the identity information of the first process by using the shared memory.