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#include <unistd.h> |
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#include <atomic> |
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#include <iostream> |
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#include <thread> |
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#include <vector> |
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#include "shared_memory/condition_variable.hpp" |
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#include "shared_memory/lock.hpp" |
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#include "shared_memory/mutex.hpp" |
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#define MUTEX_ID "sm_cond_var_demo_mutex" |
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#define CV_SEGMENT_ID "sm_cond_var_demo_segment" |
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#define RUNNING_SEGMENT_ID "sm_running_demo_segment" |
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#define RUNNING_OBJECT_ID "sm_running_demo_object" |
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#define VALUE 1 |
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void update_vector() |
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{ |
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std::vector<int> v(1000000); |
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shared_memory::Mutex::clean(MUTEX_ID); |
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shared_memory::Mutex mutex(MUTEX_ID); |
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shared_memory::ConditionVariable condition(CV_SEGMENT_ID, true); |
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// starting ping |
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std::cout << "\nstarting PING...\n"; |
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condition.notify_one(); |
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std::cout << "\nstarting PONG...\n"; |
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for (unsigned int i = 0; i < 10000; i++) |
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{ |
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{ |
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shared_memory::Lock lock(mutex); |
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condition.wait(lock); |
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std::cout << "PONG "; |
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for (unsigned int j = 0; j < v.size(); j++) |
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{ |
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v[j] = VALUE; |
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} |
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usleep(500); |
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for (unsigned int j = 0; j < v.size(); j++) |
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{ |
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if (v[j] != VALUE) |
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{ |
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std::cout << "\n--- damn, the vector was not locked !\n"; |
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break; |
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} |
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if (j < 10) |
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{ |
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std::cout << " " << v[j]; |
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} |
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} |
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std::cout << "\n"; |
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} |
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condition.notify_one(); |
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} |
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// stopping ping |
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shared_memory::set<bool>(RUNNING_SEGMENT_ID, RUNNING_OBJECT_ID, false); |
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} |
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int main() |
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{ |
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bool go_ahead; |
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try |
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{ |
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// ping should be started first. |
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// if it is starting, below will not fail |
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bool foo; |
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shared_memory::get<bool>(RUNNING_SEGMENT_ID, RUNNING_OBJECT_ID, foo); |
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go_ahead = true; |
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} |
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catch (...) |
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{ |
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std::cout << "\nstart sm_cond_var_ping first !\n\n"; |
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} |
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if (go_ahead) |
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{ |
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shared_memory::set<bool>(RUNNING_SEGMENT_ID, RUNNING_OBJECT_ID, true); |
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update_vector(); |
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} |
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} |
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