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LibC: Implement `flockfile and funlockfile`

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To do this, we must set the type attribute when initializing a FILE to
``__PTHREAD_MUTEX_RECURSIVE``.
This commit is contained in:
Conor Byrne 2022-01-01 00:18:21 +00:00 • committed by Brian Gianforcaro
parent aa0db4e4b0
commit 8515d7d5ab
2 changed files with 11 additions and 10 deletions
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11
Userland/Libraries/LibC/bits/stdio_file_implementation.h
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@ -19,7 +19,8 @@ public:
: m_fd(fd)
, m_mode(mode)
{
__pthread_mutex_init(&m_mutex, nullptr);
pthread_mutexattr_t attr = { __PTHREAD_MUTEX_RECURSIVE };
__pthread_mutex_init(&m_mutex, &attr);
}
~FILE();
@ -31,6 +32,9 @@ public:
void purge();
bool close();
void lock();
void unlock();
int fileno() const { return m_fd; }
bool eof() const { return m_eof; }
int mode() const { return m_mode; }
@ -115,9 +119,6 @@ private:
// Flush *some* data from the buffer.
bool write_from_buffer();
void lock();
void unlock();
int m_fd { -1 };
int m_mode { 0 };
u8 m_flags { Flags::None };
@ -126,8 +127,6 @@ private:
pid_t m_popen_child { -1 };
Buffer m_buffer;
__pthread_mutex_t m_mutex;
friend class ScopedFileLock;
};
class ScopedFileLock {