1e41f4b71Sopenharmony_ci# DDK_Ashmem 2e41f4b71Sopenharmony_ci 3e41f4b71Sopenharmony_ci 4e41f4b71Sopenharmony_ci## 概述 5e41f4b71Sopenharmony_ci 6e41f4b71Sopenharmony_ci共享内存结构体。 7e41f4b71Sopenharmony_ci 8e41f4b71Sopenharmony_ci**起始版本：** 9e41f4b71Sopenharmony_ci 10e41f4b71Sopenharmony_ci12 11e41f4b71Sopenharmony_ci 12e41f4b71Sopenharmony_ci**相关模块：** 13e41f4b71Sopenharmony_ci 14e41f4b71Sopenharmony_ci[BASE DDK](_base_ddk.md) 15e41f4b71Sopenharmony_ci 16e41f4b71Sopenharmony_ci 17e41f4b71Sopenharmony_ci## 汇总 18e41f4b71Sopenharmony_ci 19e41f4b71Sopenharmony_ci 20e41f4b71Sopenharmony_ci### 成员变量 21e41f4b71Sopenharmony_ci 22e41f4b71Sopenharmony_ci| 名称 | 描述 | 23e41f4b71Sopenharmony_ci| -------- | -------- | 24e41f4b71Sopenharmony_ci| [ashmemFd](#ashmemfd) | 共享内存的文件描述符。 | 25e41f4b71Sopenharmony_ci| [address](#address) | 共享内存映射地址。 | 26e41f4b71Sopenharmony_ci| [size](#size) | 数组长度。 | 27e41f4b71Sopenharmony_ci| [offset](#offset) | 偏移量。 | 28e41f4b71Sopenharmony_ci| [bufferLength](#bufferlength) | 实际使用的数组长度。 | 29e41f4b71Sopenharmony_ci| [transferredLength](#transferredlength) | 传输数据的长度。 | 30e41f4b71Sopenharmony_ci 31e41f4b71Sopenharmony_ci 32e41f4b71Sopenharmony_ci## 结构体成员变量说明 33e41f4b71Sopenharmony_ci 34e41f4b71Sopenharmony_ci 35e41f4b71Sopenharmony_ci### ashmemFd 36e41f4b71Sopenharmony_ci 37e41f4b71Sopenharmony_ci 38e41f4b71Sopenharmony_ci~~~ 39e41f4b71Sopenharmony_ciint32_t ashmemFd 40e41f4b71Sopenharmony_ci~~~ 41e41f4b71Sopenharmony_ci 42e41f4b71Sopenharmony_ci**描述:** 43e41f4b71Sopenharmony_ci 44e41f4b71Sopenharmony_ci共享内存的文件描述符。 45e41f4b71Sopenharmony_ci 46e41f4b71Sopenharmony_ci 47e41f4b71Sopenharmony_ci### address 48e41f4b71Sopenharmony_ci 49e41f4b71Sopenharmony_ci 50e41f4b71Sopenharmony_ci~~~ 51e41f4b71Sopenharmony_ciconst uint8_t * address 52e41f4b71Sopenharmony_ci~~~ 53e41f4b71Sopenharmony_ci 54e41f4b71Sopenharmony_ci**描述:** 55e41f4b71Sopenharmony_ci 56e41f4b71Sopenharmony_ci共享内存映射地址。 57e41f4b71Sopenharmony_ci 58e41f4b71Sopenharmony_ci 59e41f4b71Sopenharmony_ci### size 60e41f4b71Sopenharmony_ci 61e41f4b71Sopenharmony_ci 62e41f4b71Sopenharmony_ci~~~ 63e41f4b71Sopenharmony_ciconst uint32_t size 64e41f4b71Sopenharmony_ci~~~ 65e41f4b71Sopenharmony_ci 66e41f4b71Sopenharmony_ci**描述:** 67e41f4b71Sopenharmony_ci 68e41f4b71Sopenharmony_ci数组长度。 69e41f4b71Sopenharmony_ci 70e41f4b71Sopenharmony_ci 71e41f4b71Sopenharmony_ci### offset 72e41f4b71Sopenharmony_ci 73e41f4b71Sopenharmony_ci 74e41f4b71Sopenharmony_ci~~~ 75e41f4b71Sopenharmony_ciuint32_t offset 76e41f4b71Sopenharmony_ci~~~ 77e41f4b71Sopenharmony_ci 78e41f4b71Sopenharmony_ci**描述:** 79e41f4b71Sopenharmony_ci 80e41f4b71Sopenharmony_ci偏移量。 81e41f4b71Sopenharmony_ci 82e41f4b71Sopenharmony_ci 83e41f4b71Sopenharmony_ci### bufferLength 84e41f4b71Sopenharmony_ci 85e41f4b71Sopenharmony_ci 86e41f4b71Sopenharmony_ci~~~ 87e41f4b71Sopenharmony_ciuint32_t bufferLength 88e41f4b71Sopenharmony_ci~~~ 89e41f4b71Sopenharmony_ci 90e41f4b71Sopenharmony_ci**描述:** 91e41f4b71Sopenharmony_ci 92e41f4b71Sopenharmony_ci实际使用的数组长度。 93e41f4b71Sopenharmony_ci 94e41f4b71Sopenharmony_ci 95e41f4b71Sopenharmony_ci### transferredLength 96e41f4b71Sopenharmony_ci 97e41f4b71Sopenharmony_ci 98e41f4b71Sopenharmony_ci~~~ 99e41f4b71Sopenharmony_ciuint32_t transferredLength 100e41f4b71Sopenharmony_ci~~~ 101e41f4b71Sopenharmony_ci 102e41f4b71Sopenharmony_ci**描述:** 103e41f4b71Sopenharmony_ci 104e41f4b71Sopenharmony_ci传输数据的长度。 105