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Preallocate the maximum number of FileHandle pointers (fds) in every process.

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This could even use a more specific data structure since it doesn't need the
grow/shrink capabilities of a vector.
This commit is contained in:
Andreas Kling 2018-11-01 13:39:28 +01:00
parent fce81d376c
commit 065f0aee35
4 changed files with 37 additions and 18 deletions
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8
Kernel/Process.h
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@ -124,8 +124,6 @@ public:
pid_t waitee() const { return m_waitee; }
size_t fileHandleCount() const { return m_fileHandles.size(); }
dword framePtr() const { return m_tss.ebp; }
dword stackPtr() const { return m_tss.esp; }
dword stackTop() const { return m_tss.ss == 0x10 ? m_stackTop0 : m_stackTop3; }
@ -137,6 +135,8 @@ public:
InodeIdentifier cwdInode() const { return m_cwd ? m_cwd->inode : InodeIdentifier(); }
InodeIdentifier executableInode() const { return m_executable ? m_executable->inode : InodeIdentifier(); }
size_t number_of_open_file_descriptors() const;
private:
friend class MemoryManager;
friend bool scheduleNewProcess();
@ -164,7 +164,7 @@ private:
DWORD m_wakeupTime { 0 };
TSS32 m_tss;
Descriptor* m_ldtEntries { nullptr };
Vector<OwnPtr<FileHandle>> m_fileHandles;
Vector<OwnPtr<FileHandle>> m_file_descriptors;
RingLevel m_ring { Ring0 };
int m_error { 0 };
void* m_kernelStack { nullptr };
@ -172,7 +172,7 @@ private:
pid_t m_waitee { -1 };
int m_waiteeStatus { 0 };
int m_fdBlockedOnRead { -1 };
size_t m_maxFileHandles { 16 };
size_t m_max_open_file_descriptors { 16 };
RetainPtr<VirtualFileSystem::Node> m_cwd;
RetainPtr<VirtualFileSystem::Node> m_executable;