1fb5d14751
Reviewers: buda Reviewed By: buda Subscribers: pullbot Differential Revision: https://phabricator.memgraph.io/D2628
66 lines
1.8 KiB
C++
66 lines
1.8 KiB
C++
/// @file
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#pragma once
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#include <filesystem>
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#include <map>
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#include <mutex>
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#include <string>
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#include <json/json.hpp>
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namespace auth {
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struct TargetArguments {
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std::filesystem::path module_executable_path;
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int pipe_to_module{-1};
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int pipe_from_module{-1};
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};
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/// Wrapper around the module executable.
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class Module final {
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private:
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const int kStackSizeBytes = 262144;
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public:
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explicit Module(const std::filesystem::path &module_executable_path);
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Module(const Module &) = delete;
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Module(Module &&) = delete;
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Module &operator=(const Module &) = delete;
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Module &operator=(Module &&) = delete;
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/// Call the function in the module with the specified parameters and return
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/// the response.
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///
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/// @param parameters dict used to call the module function
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/// @param timeout_millisec timeout in ms used for communication with the
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/// module
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/// @return dict retuned by module function
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nlohmann::json Call(const nlohmann::json ¶ms, int timeout_millisec);
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/// This function returns a boolean value indicating whether the module has a
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/// specified executable path and can thus be used.
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///
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/// @return boolean indicating whether the module can be used
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bool IsUsed();
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~Module();
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private:
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bool Startup();
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void Shutdown();
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std::filesystem::path module_executable_path_;
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std::mutex lock_;
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pid_t pid_{-1};
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int status_{0};
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// The stack used for the `clone` system call must be heap allocated.
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std::unique_ptr<uint8_t[]> stack_{new uint8_t[kStackSizeBytes]};
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// The target arguments passed to the new process must be heap allocated.
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std::unique_ptr<TargetArguments> target_arguments_{new TargetArguments()};
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int pipe_to_module_[2] = {-1, -1};
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int pipe_from_module_[2] = {-1, -1};
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};
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} // namespace auth
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