pw_sync: Allow implict conversion when moving BorrowedPointer

This CL allows move-constructing or move-assigning a BorrowedPointer
from another when the latter's template parameter types are assignable
to the former's template parameter types.

For example, if `Derived` is derived from `Base`, this CL makes it
possible to write:

```
  Derived derived;
  VirtualBasicLockable lock;
  Borrowable<Derived> borrowable_derived(derived, lock);
  BorrowedPointer<Base> borrowed_base = borrowable_derived.acquire();
```

b/323971974

Change-Id: I64126dd87877562ee9e614c63d88e677d2ebf862
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/194394
Commit-Queue: Aaron Green <aarongreen@google.com>
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Taylor Cramer <cramertj@google.com>
2 files changed
tree: efa0b2fbde6b8a800aea6df7552a96ebbc3faa8c
  1. .allstar/
  2. .vscode/
  3. build_overrides/
  4. docker/
  5. docs/
  6. kudzu/
  7. pw_alignment/
  8. pw_allocator/
  9. pw_analog/
  10. pw_android_toolchain/
  11. pw_arduino_build/
  12. pw_assert/
  13. pw_assert_basic/
  14. pw_assert_log/
  15. pw_assert_tokenized/
  16. pw_assert_zephyr/
  17. pw_async/
  18. pw_async2/
  19. pw_async2_basic/
  20. pw_async_basic/
  21. pw_base64/
  22. pw_bloat/
  23. pw_blob_store/
  24. pw_bluetooth/
  25. pw_bluetooth_hci/
  26. pw_bluetooth_profiles/
  27. pw_bluetooth_sapphire/
  28. pw_boot/
  29. pw_boot_cortex_m/
  30. pw_build/
  31. pw_build_info/
  32. pw_build_mcuxpresso/
  33. pw_bytes/
  34. pw_channel/
  35. pw_checksum/
  36. pw_chre/
  37. pw_chrono/
  38. pw_chrono_embos/
  39. pw_chrono_freertos/
  40. pw_chrono_rp2040/
  41. pw_chrono_stl/
  42. pw_chrono_threadx/
  43. pw_chrono_zephyr/
  44. pw_cli/
  45. pw_compilation_testing/
  46. pw_config_loader/
  47. pw_console/
  48. pw_containers/
  49. pw_cpu_exception/
  50. pw_cpu_exception_cortex_m/
  51. pw_crypto/
  52. pw_digital_io/
  53. pw_digital_io_mcuxpresso/
  54. pw_digital_io_rp2040/
  55. pw_docgen/
  56. pw_doctor/
  57. pw_emu/
  58. pw_env_setup/
  59. pw_env_setup_zephyr/
  60. pw_file/
  61. pw_format/
  62. pw_function/
  63. pw_fuzzer/
  64. pw_grpc/
  65. pw_hdlc/
  66. pw_hex_dump/
  67. pw_i2c/
  68. pw_i2c_linux/
  69. pw_i2c_mcuxpresso/
  70. pw_ide/
  71. pw_interrupt/
  72. pw_interrupt_cortex_m/
  73. pw_interrupt_xtensa/
  74. pw_interrupt_zephyr/
  75. pw_intrusive_ptr/
  76. pw_json/
  77. pw_kvs/
  78. pw_libc/
  79. pw_libcxx/
  80. pw_log/
  81. pw_log_android/
  82. pw_log_basic/
  83. pw_log_null/
  84. pw_log_rpc/
  85. pw_log_string/
  86. pw_log_tokenized/
  87. pw_log_zephyr/
  88. pw_malloc/
  89. pw_malloc_freelist/
  90. pw_malloc_freertos/
  91. pw_metric/
  92. pw_minimal_cpp_stdlib/
  93. pw_module/
  94. pw_multibuf/
  95. pw_multisink/
  96. pw_package/
  97. pw_perf_test/
  98. pw_persistent_ram/
  99. pw_polyfill/
  100. pw_preprocessor/
  101. pw_presubmit/
  102. pw_protobuf/
  103. pw_protobuf_compiler/
  104. pw_random/
  105. pw_result/
  106. pw_ring_buffer/
  107. pw_router/
  108. pw_rpc/
  109. pw_rpc_transport/
  110. pw_rust/
  111. pw_snapshot/
  112. pw_software_update/
  113. pw_span/
  114. pw_spi/
  115. pw_spi_mcuxpresso/
  116. pw_spi_rp2040/
  117. pw_status/
  118. pw_stm32cube_build/
  119. pw_stream/
  120. pw_stream_shmem_mcuxpresso/
  121. pw_stream_uart_linux/
  122. pw_stream_uart_mcuxpresso/
  123. pw_string/
  124. pw_symbolizer/
  125. pw_sync/
  126. pw_sync_baremetal/
  127. pw_sync_embos/
  128. pw_sync_freertos/
  129. pw_sync_stl/
  130. pw_sync_threadx/
  131. pw_sync_zephyr/
  132. pw_sys_io/
  133. pw_sys_io_ambiq_sdk/
  134. pw_sys_io_arduino/
  135. pw_sys_io_baremetal_lm3s6965evb/
  136. pw_sys_io_baremetal_stm32f429/
  137. pw_sys_io_emcraft_sf2/
  138. pw_sys_io_mcuxpresso/
  139. pw_sys_io_rp2040/
  140. pw_sys_io_stdio/
  141. pw_sys_io_stm32cube/
  142. pw_sys_io_zephyr/
  143. pw_system/
  144. pw_target_runner/
  145. pw_thread/
  146. pw_thread_embos/
  147. pw_thread_freertos/
  148. pw_thread_stl/
  149. pw_thread_threadx/
  150. pw_thread_zephyr/
  151. pw_tls_client/
  152. pw_tls_client_boringssl/
  153. pw_tls_client_mbedtls/
  154. pw_tokenizer/
  155. pw_toolchain/
  156. pw_toolchain_bazel/
  157. pw_trace/
  158. pw_trace_tokenized/
  159. pw_transfer/
  160. pw_unit_test/
  161. pw_unit_test_zephyr/
  162. pw_varint/
  163. pw_watch/
  164. pw_web/
  165. pw_work_queue/
  166. seed/
  167. targets/
  168. third_party/
  169. ts/
  170. zephyr/
  171. .bazelignore
  172. .bazelrc
  173. .black.toml
  174. .clang-format
  175. .clang-tidy
  176. .eslintrc.cjs
  177. .git-blame-ignore-revs
  178. .gitattributes
  179. .gitignore
  180. .gn
  181. .mypy.ini
  182. .prettierignore
  183. .prettierrc.cjs
  184. .pw_ide.yaml
  185. .pylintrc
  186. activate.bat
  187. Android.bp
  188. AUTHORS
  189. bootstrap.bat
  190. bootstrap.sh
  191. BUILD.bazel
  192. BUILD.gn
  193. BUILDCONFIG.gn
  194. CMakeLists.txt
  195. jest.config.ts
  196. Kconfig.zephyr
  197. LICENSE
  198. modules.gni
  199. OWNERS
  200. package-lock.json
  201. package.json
  202. pigweed.json
  203. PIGWEED_MODULES
  204. README.md
  205. rollup.config.js
  206. tsconfig.json
  207. WORKSPACE
README.md

Pigweed

Pigweed is an open source collection of embedded-targeted libraries–or as we like to call them, modules. These modules are building blocks and infrastructure that enable faster and more reliable development on small-footprint MMU-less 32-bit microcontrollers like the STMicroelectronics STM32L452 or the Nordic nRF52832.

For more information please see our website: https://pigweed.dev/.

Links