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author | Yi Kong <yikong@google.com> | 2021-02-01 20:25:31 +0800 |
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committer | Yi Kong <yikong@google.com> | 2021-02-08 18:30:47 +0000 |
commit | b115d5f8044b221616dc4ad5e099f72b9f5f0f1d (patch) | |
tree | c5c61d02b22ba427552c27086981d892bad5a986 /profcollectd/libprofcollectd/bindings/libflags/lib.rs | |
parent | b2456d60df6d9b2e5427bcc30d0ffecdaf4f37b1 (diff) | |
download | extras-b115d5f8044b221616dc4ad5e099f72b9f5f0f1d.tar.gz |
profcollectd: Rust bindings for libflags
To be used by complete Rust rewrite of profcollect.
Test: rustc
Bug: 163175424
Change-Id: I14f82030bfc5dc9c7790cbe5f1d5d65130a05a19
Diffstat (limited to 'profcollectd/libprofcollectd/bindings/libflags/lib.rs')
-rw-r--r-- | profcollectd/libprofcollectd/bindings/libflags/lib.rs | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/profcollectd/libprofcollectd/bindings/libflags/lib.rs b/profcollectd/libprofcollectd/bindings/libflags/lib.rs new file mode 100644 index 00000000..c8875cb1 --- /dev/null +++ b/profcollectd/libprofcollectd/bindings/libflags/lib.rs @@ -0,0 +1,43 @@ +// +// Copyright (C) 2021 The Android Open Source Project +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +// + +//! This module implements safe wrappers for GetServerConfigurableFlag method +//! from libflags. + +use std::ffi::{CStr, CString}; + +/// Use the category name and flag name registered in SettingsToPropertiesMapper.java +/// to query the experiment flag value. This method will return default_value if +/// querying fails. +/// Note that for flags from Settings.Global, experiment_category_name should +/// always be global_settings. +pub fn get_server_configurable_flag<'a>( + experiment_category_name: &str, + experiment_flag_name: &str, + default_value: &'a str, +) -> &'a str { + let experiment_category_name = CString::new(experiment_category_name).unwrap(); + let experiment_flag_name = CString::new(experiment_flag_name).unwrap(); + let default_value = CString::new(default_value).unwrap(); + unsafe { + let cstr = profcollect_libflags_bindgen::GetServerConfigurableFlag( + experiment_category_name.as_ptr(), + experiment_flag_name.as_ptr(), + default_value.as_ptr(), + ); + CStr::from_ptr(cstr).to_str().unwrap() + } +} |