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feat(util/shared_mutex): skip shared_mutex implementation if LEAN_MULTI_THREAD is not defined

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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
This commit is contained in:
Leonardo de Moura 2013-12-09 15:42:08 -08:00
parent 8f2fe273ea
commit 533ed51f51
2 changed files with 20 additions and 0 deletions
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2
src/util/shared_mutex.cpp
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@ -14,6 +14,7 @@
#include "util/shared_mutex.h" #include "util/shared_mutex.h"
namespace lean { namespace lean {
#if defined(LEAN_MULTI_THREAD)
shared_mutex::shared_mutex():m_rw_counter(0), m_state(0) {} shared_mutex::shared_mutex():m_rw_counter(0), m_state(0) {}
shared_mutex::~shared_mutex() { shared_mutex::~shared_mutex() {
lock_guard<mutex> lock(m_mutex); lock_guard<mutex> lock(m_mutex);
@ -117,4 +118,5 @@ void shared_mutex::unlock_shared() {
m_gate1.notify_one(); m_gate1.notify_one();
} }
} }
#endif
} }

18
src/util/shared_mutex.h
View file

@ -14,6 +14,7 @@
#include "util/thread.h" #include "util/thread.h"
namespace lean { namespace lean {
#if defined(LEAN_MULTI_THREAD)
class shared_mutex { class shared_mutex {
mutex m_mutex; mutex m_mutex;
thread::id m_rw_owner; thread::id m_rw_owner;
@ -42,6 +43,23 @@ public:
bool try_lock_shared(); bool try_lock_shared();
void unlock_shared(); void unlock_shared();
}; };
#else
class shared_mutex {
public:
shared_mutex() {}
shared_mutex(shared_mutex const &) = delete;
shared_mutex(shared_mutex &&) = delete;
shared_mutex& operator=(shared_mutex const &) = delete;
shared_mutex&& operator=(shared_mutex &&) = delete;
void lock() {}
bool try_lock() { return true; }
void unlock() {}
void lock_shared() {}
bool try_lock_shared() { return true; }
void unlock_shared() {}
};
#endif
class shared_lock { class shared_lock {
shared_mutex & m_mutex; shared_mutex & m_mutex;