62 lines
1.4 KiB
C++
62 lines
1.4 KiB
C++
// windbg/util.cc
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// 1/27/2013 jichi
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#include "windbg/util.h"
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#include <tlhelp32.h>
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#include <boost/foreach.hpp>
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#include <list>
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WINDBG_BEGIN_NAMESPACE
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class ThreadsSuspenderPrivate
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{
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public:
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std::list<HANDLE> threads;
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};
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ThreadsSuspender::ThreadsSuspender(bool autoSuspend)
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: d_(new D)
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{ if (autoSuspend) suspend(); }
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ThreadsSuspender::~ThreadsSuspender()
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{
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resume();
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delete d_;
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}
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void ThreadsSuspender::suspend()
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{
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HANDLE hSnap = ::CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD, 0);
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if (hSnap == INVALID_HANDLE_VALUE)
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return;
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THREADENTRY32 entry;
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entry.dwSize = sizeof(entry);
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DWORD pid = ::GetCurrentProcessId();
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DWORD tid = ::GetCurrentThreadId();
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if (::Thread32First(hSnap, &entry))
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do if (entry.dwSize >= 4 * sizeof(DWORD) && entry.th32OwnerProcessID == pid && entry.th32ThreadID != tid) {
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if (HANDLE hThread = ::OpenThread(THREAD_SUSPEND_RESUME, 0, entry.th32ThreadID)) {
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if (::SuspendThread(hThread) != DWORD(-1))
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d_->threads.push_back(hThread);
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else
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::CloseHandle(hThread);
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}
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entry.dwSize = sizeof(entry);
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} while (::Thread32Next(hSnap, &entry));
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::CloseHandle(hSnap);
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}
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void ThreadsSuspender::resume()
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{
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if (!d_->threads.empty()) {
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BOOST_FOREACH (HANDLE hThread, d_->threads) {
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::ResumeThread(hThread);
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::CloseHandle(hThread);
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}
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d_->threads.clear();
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}
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}
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WINDBG_END_NAMESPACE
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// EOF
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