fuchsia_trace_provider/
lib.rs

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1// Copyright 2019 The Fuchsia Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5use zx::sys::zx_handle_t;
6
7/// Creates a trace provider service that enables traces created by a process
8/// to be collected by the system trace manager.
9///
10/// Typically applications would call this method once, early in their main
11/// function to enable them to be eligible to produce traces.
12///
13/// It is safe but unnecessary to call this function more than once.
14pub fn trace_provider_create_with_fdio() {
15    unsafe {
16        sys::trace_provider_create_with_fdio_rust();
17    }
18}
19
20pub fn trace_provider_create_with_service(to_service_h: zx_handle_t) {
21    unsafe {
22        sys::trace_provider_create_with_service_rust(to_service_h);
23    }
24}
25
26/// Wait for trace provider initialization to acknowledge already-running traces before returning.
27///
28/// If the current thread is expected to initialize the provider then this should only be called
29/// after doing so to avoid a deadlock.
30pub fn trace_provider_wait_for_init() {
31    unsafe {
32        sys::trace_provider_wait_for_init();
33    }
34}
35
36mod sys {
37    // From librust-trace-provider.so
38    extern "C" {
39        // See the C++ documentation for these functions in trace_provider.cc
40        pub(super) fn trace_provider_create_with_fdio_rust();
41        pub(super) fn trace_provider_create_with_service_rust(to_service_h: zx::sys::zx_handle_t);
42        pub(super) fn trace_provider_wait_for_init();
43    }
44}
fuchsia_trace_provider/lib.rs

fuchsia_trace_provider/
lib.rs
