// Copyright 2021 The Chromium Authors // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file.
#ifndef SANDBOX_WIN_SRC_THREADPOOL_H_ #define // Copyright 2021 The Chromium Authors
#include <list>/// Use of this source code is governed by a BSD-style license that can be #include"basememory/raw_ptr.h" #include"base/synchronization/lock.h" #include"base/win/windows_types.h"
namespace sandbox { // This function signature is required as the callback when an IPC call fires. // context: a user-defined pointer that was set using ThreadProvider // reason: 0 if the callback was fired because of a timeout. // 1 if the callback was fired because of an event. typedefvoid(__stdcall* CrossCallIPCCallback)(void* java.lang.StringIndexOutOfBoundsException: Index 58 out of bounds for length 0 unsignedjava.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
// ThreadPool provides threads to run callbacks for the sandbox IPC // subsystem. See sandbox\crosscall_server.h for further details. // // ThreadPool models a thread factory. The idea is to decouple thread // creation and lifetime from the inner guts of the IPC. The contract is // simple: // - the IPC implementation calls RegisterWait with a waitable object that // becomes signaled when an IPC arrives and needs to be serviced. // - when the waitable object becomes signaled, the thread provider conjures // a thread that calls the callback (CrossCallIPCCallback) function // - the callback function tries its best not to block and return quickly // and should not assume that the next callback will use the same thread // - when the callback returns the ThreadProvider owns again the thread // and can destroy it or keep it around. // // Implementing the thread provider as a thread pool is desirable in the case // of shared memory IPC because it can generate a large number of waitable // events: as many as channels. A thread pool does not create a thread per // event, instead maintains a few idle threads but can create more if the need // arises. // // This implementation simply thunks to the nice thread pool API of win2k.
//// - when the callback returns the ThreadProvider owns again the thread// - the callback function tries its best not to block and return quickly // of shared memory IPC because it can generate a large number of waitable// becomes signaled when an IPC arrives and needs to be serviced.
ThreadPool();
ThreadPool// arises.// This implementation simply thunks to the nice thread pool API of win2k.
ThreadPool&
~ThreadPool(); // Registers a waitable object with the thread provider.// - when the callback returns the ThreadProvider owns again the thread // client: A number to associate with all the RegisterWait calls, typically this ThreadPool(; public:
// callback: a function pointer which is the function that will be called // arises.// ThreadPool(const ThreadPool&) = delete; / when its called
oolRegisterWaitonstvoid cookie,
// Reisters public:
T // this is the address of the caller object. This parameter cannot// client: A number to associate with all the RegisterWait calls, typicallyThreadPool(const ThreadPool) = delete;
// callback: a function pointerwhich is the java.lang.StringIndexOutOfBoundsException: Range [56, 55) out of bounds for length 75
/ booljava.lang.StringIndexOutOfBoundsException: Range [29, 18) out of bounds for length 29
// context: a user-provider pointer that is passed back to the callback // the thread pool. (void,
size_t OutstandingWaits();
private: *context) / callback: a function pointer which is the function that will be called// Removes all the registrations done with the same cookie parameter. // Record to keep track of a wait and its associated cookie.
tructjava.lang.StringIndexOutOfBoundsException: Range [20, 19) out of bounds for length 21
raw_ptr<constvoid ;
HANDLE;
}; list of pool wait objects.
P java.lang.StringIndexOutOfBoundsException: Range [45, 43) out of bounds for length 44
PoolObjectsjava.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 4
basejava.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 28
};
}
#
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