pw_rpc: ChannelOutput buffer handling fixes

- Ensure ChannelOutput buffers are always released when a call is
  closed.
  * Release any held buffer when aborting a server call due to an error.
  * Permit calling AcquirePayloadBuffer() on an inactive call, but
    return an empty buffer if it is called while inactive. Previously,
    this was disallowed, but it may not be possible to prevent an
    accidental AcquirePayloadBuffer() on a closed call if it is closed
    by a different thread.
  * Release any held buffer when a client call goes out of scope or is
    aborted.
- Extend locking annotations to cover setting callbacks.
- Expose the function to end client streams as CloseClientStream().

Change-Id: I892c66bbeb1701329783b8c360d02ffe25992d98
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/78622
Reviewed-by: Alexei Frolov <frolv@google.com>
Commit-Queue: Wyatt Hepler <hepler@google.com>
16 files changed
tree: 8dfae073e03e0185605758a8a4a001182e5d9c42
  1. build_overrides/
  2. docker/
  3. docs/
  4. pw_allocator/
  5. pw_analog/
  6. pw_android_toolchain/
  7. pw_arduino_build/
  8. pw_assert/
  9. pw_assert_basic/
  10. pw_assert_log/
  11. pw_assert_zephyr/
  12. pw_base64/
  13. pw_bloat/
  14. pw_blob_store/
  15. pw_bluetooth_hci/
  16. pw_boot/
  17. pw_boot_cortex_m/
  18. pw_build/
  19. pw_build_info/
  20. pw_build_mcuxpresso/
  21. pw_bytes/
  22. pw_checksum/
  23. pw_chrono/
  24. pw_chrono_embos/
  25. pw_chrono_freertos/
  26. pw_chrono_stl/
  27. pw_chrono_threadx/
  28. pw_chrono_zephyr/
  29. pw_cli/
  30. pw_console/
  31. pw_containers/
  32. pw_cpu_exception/
  33. pw_cpu_exception_cortex_m/
  34. pw_crypto/
  35. pw_docgen/
  36. pw_doctor/
  37. pw_env_setup/
  38. pw_file/
  39. pw_function/
  40. pw_fuzzer/
  41. pw_hdlc/
  42. pw_hex_dump/
  43. pw_i2c/
  44. pw_interrupt/
  45. pw_interrupt_cortex_m/
  46. pw_interrupt_zephyr/
  47. pw_kvs/
  48. pw_libc/
  49. pw_log/
  50. pw_log_basic/
  51. pw_log_null/
  52. pw_log_rpc/
  53. pw_log_tokenized/
  54. pw_log_zephyr/
  55. pw_malloc/
  56. pw_malloc_freelist/
  57. pw_metric/
  58. pw_minimal_cpp_stdlib/
  59. pw_module/
  60. pw_multisink/
  61. pw_package/
  62. pw_persistent_ram/
  63. pw_polyfill/
  64. pw_preprocessor/
  65. pw_presubmit/
  66. pw_protobuf/
  67. pw_protobuf_compiler/
  68. pw_random/
  69. pw_result/
  70. pw_ring_buffer/
  71. pw_router/
  72. pw_rpc/
  73. pw_snapshot/
  74. pw_software_update/
  75. pw_span/
  76. pw_spi/
  77. pw_status/
  78. pw_stm32cube_build/
  79. pw_stream/
  80. pw_string/
  81. pw_symbolizer/
  82. pw_sync/
  83. pw_sync_baremetal/
  84. pw_sync_embos/
  85. pw_sync_freertos/
  86. pw_sync_stl/
  87. pw_sync_threadx/
  88. pw_sync_zephyr/
  89. pw_sys_io/
  90. pw_sys_io_arduino/
  91. pw_sys_io_baremetal_lm3s6965evb/
  92. pw_sys_io_baremetal_stm32f429/
  93. pw_sys_io_mcuxpresso/
  94. pw_sys_io_stdio/
  95. pw_sys_io_stm32cube/
  96. pw_sys_io_zephyr/
  97. pw_system/
  98. pw_target_runner/
  99. pw_thread/
  100. pw_thread_embos/
  101. pw_thread_freertos/
  102. pw_thread_stl/
  103. pw_thread_threadx/
  104. pw_tls_client/
  105. pw_tls_client_boringssl/
  106. pw_tls_client_mbedtls/
  107. pw_tokenizer/
  108. pw_tool/
  109. pw_toolchain/
  110. pw_trace/
  111. pw_trace_tokenized/
  112. pw_transfer/
  113. pw_unit_test/
  114. pw_varint/
  115. pw_watch/
  116. pw_web_ui/
  117. pw_work_queue/
  118. targets/
  119. third_party/
  120. zephyr/
  121. .bazelignore
  122. .bazelrc
  123. .clang-format
  124. .clang-tidy
  125. .eslintrc.json
  126. .gitattributes
  127. .gitignore
  128. .gn
  129. .prettierrc.js
  130. .pylintrc
  131. AUTHORS
  132. Android.bp
  133. BUILD.bazel
  134. BUILD.gn
  135. BUILDCONFIG.gn
  136. CMakeLists.txt
  137. Kconfig.zephyr
  138. LICENSE
  139. OWNERS
  140. PW_PLUGINS
  141. README.md
  142. WORKSPACE
  143. activate.bat
  144. bootstrap.bat
  145. bootstrap.sh
  146. modules.gni
  147. package.json
  148. tsconfig.json
  149. yarn.lock
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