CODEWITHSUNDEEP
androidfilelockingandroid-ndkcups
shubham
shubham

Reputation: 21

Implementation of lockf() for android NDK

The Android NDK lacks the lockf() function. While I was compiling CUPS with Android NDK, the error came of missing lockf(). Hence there is need to create function similar to lockf() for NDK. Please help me in creating such a function.

Any help will be highly appreciated.

PS:I m a noob

Upvotes: 2

Views: 1676

Answers (2)

koda
koda

Reputation: 749

This is how another Google produce handles it

// The lockf() function is not available on Android; we translate to flock().
#define F_LOCK LOCK_EX
#define F_ULOCK LOCK_UN
inline int lockf(int fd, int cmd, off_t ignored_len) {
    return flock(fd, cmd);
}

https://src.chromium.org/svn/branches/1312/src/base/os_compat_android.h

Upvotes: 2

Howell ZHU
Howell ZHU

Reputation: 1

Even if you implement the lockf() you'll still have some problems using it, because Android has a restricted permission management. Generally two processes won't both have read/write permission on a same directory. I mean, you have no directory to place this file to be locked.

Upvotes: 0

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