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author | Ben Longbons <b.r.longbons@gmail.com> | 2012-08-30 16:16:25 -0700 |
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committer | Ben Longbons <b.r.longbons@gmail.com> | 2012-08-30 17:03:31 -0700 |
commit | 41974ae5265fbc23a06f276f9e008d5dad020e0b (patch) | |
tree | 9d595215172e87e2d83b74f7bf3430b3040e780e /src/common/lock.cpp | |
parent | 21742909143df9159b2401c3e2a39cc0b2bad620 (diff) | |
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Rename files for C++ conversion. Does not compile.
After updating, you can remove these files, as shown in 'git status':
Untracked files:
(use "git add <file>..." to include in what will be committed)
src/map/magic-interpreter-lexer.c
src/map/magic-interpreter-parser.c
src/map/magic-interpreter-parser.h
Diffstat (limited to 'src/common/lock.cpp')
-rw-r--r-- | src/common/lock.cpp | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/common/lock.cpp b/src/common/lock.cpp new file mode 100644 index 0000000..2ba9a0a --- /dev/null +++ b/src/common/lock.cpp @@ -0,0 +1,36 @@ +#include <unistd.h> +#include <stdio.h> +#include "lock.hpp" +#include "socket.hpp" + +/// Protected file writing +/// (Until the file is closed, it keeps the old file) + +// Start writing a tmpfile +FILE *lock_fopen (const char *filename, int *info) +{ + char newfile[512]; + FILE *fp; + int no = getpid (); + + // Get a filename that doesn't already exist + do + { + sprintf (newfile, "%s_%d.tmp", filename, no++); + } + while ((fp = fopen_ (newfile, "r")) && (fclose_ (fp), 1)); + *info = --no; + return fopen_ (newfile, "w"); +} + +// Delete the old file and rename the new file +void lock_fclose (FILE * fp, const char *filename, int *info) +{ + char newfile[512]; + if (fp) + { + fclose_ (fp); + sprintf (newfile, "%s_%d.tmp", filename, *info); + rename (newfile, filename); + } +} |