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[orbis-kernel] Initial osem semaphore implementation

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This commit is contained in:
Ivan Chikish 2023-07-17 19:53:48 +03:00
parent 00690fd685
commit 439444d72b
5 changed files with 209 additions and 22 deletions
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26
orbis-kernel/include/orbis/KernelContext.hpp
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@ -1,5 +1,6 @@
#pragma once
#include "evf.hpp"
#include "osem.hpp"
#include "utils/LinkedNode.hpp"
#include "utils/SharedCV.hpp"
#include "utils/SharedMutex.hpp"
@ -81,6 +82,28 @@ public:
return {};
}
std::pair<Semaphore *, bool> createSemaphore(utils::kstring name,
std::uint32_t attrs,
std::int32_t initCount,
std::int32_t maxCount) {
std::lock_guard lock(m_sem_mtx);
auto [it, inserted] = m_semaphores.try_emplace(std::move(name), nullptr);
if (inserted) {
it->second = knew<Semaphore>(attrs, initCount, maxCount);
}
return {it->second.get(), inserted};
}
Ref<Semaphore> findSemaphore(std::string_view name) {
std::lock_guard lock(m_sem_mtx);
if (auto it = m_semaphores.find(name); it != m_semaphores.end()) {
return it->second;
}
return {};
}
enum {
c_golden_ratio_prime = 2654404609u,
c_umtx_chains = 512,
@ -122,6 +145,9 @@ private:
shared_mutex m_evf_mtx;
utils::kmap<utils::kstring, Ref<EventFlag>> m_event_flags;
shared_mutex m_sem_mtx;
utils::kmap<utils::kstring, Ref<Semaphore>> m_semaphores;
};
extern KernelContext &g_context;