| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* Copyright (C) 2004 Manuel Novoa III <mjn3@codepoet.org> |
| 2 | * |
| 3 | * GNU Library General Public License (LGPL) version 2 or later. |
| 4 | * |
| 5 | * Dedicated to Toni. See uClibc/DEDICATION.mjn3 for details. |
| 6 | */ |
| 7 | |
| 8 | #include "_stdio.h" |
| 9 | |
| 10 | |
| 11 | int fclose(register FILE *stream) |
| 12 | { |
| 13 | int rv = 0; |
| 14 | __STDIO_AUTO_THREADLOCK_VAR; |
| 15 | |
| 16 | #ifdef __STDIO_HAS_OPENLIST |
| 17 | #if !defined(__UCLIBC_HAS_THREADS__) || !defined(__STDIO_BUFFERS) |
| 18 | /* First, remove the file from the open file list. */ |
| 19 | { |
| 20 | FILE *ptr; |
| 21 | |
| 22 | __STDIO_THREADLOCK_OPENLIST_DEL; |
| 23 | __STDIO_THREADLOCK_OPENLIST_ADD; |
| 24 | ptr = _stdio_openlist; |
| 25 | if ((ptr = _stdio_openlist) == stream) { |
| 26 | _stdio_openlist = stream->__nextopen; |
| 27 | } else { |
| 28 | while (ptr) { |
| 29 | if (ptr->__nextopen == stream) { |
| 30 | ptr->__nextopen = stream->__nextopen; |
| 31 | break; |
| 32 | } |
| 33 | ptr = ptr->__nextopen; |
| 34 | } |
| 35 | } |
| 36 | __STDIO_THREADUNLOCK_OPENLIST_ADD; |
| 37 | __STDIO_THREADUNLOCK_OPENLIST_DEL; |
| 38 | } |
| 39 | #endif |
| 40 | #endif |
| 41 | |
| 42 | __STDIO_AUTO_THREADLOCK(stream); |
| 43 | |
| 44 | __STDIO_STREAM_VALIDATE(stream); |
| 45 | |
| 46 | #ifdef __STDIO_BUFFERS |
| 47 | /* Write any pending buffered chars. */ |
| 48 | if (__STDIO_STREAM_IS_WRITING(stream)) { |
| 49 | rv = fflush_unlocked(stream); |
| 50 | } |
| 51 | #endif |
| 52 | |
| 53 | if (__CLOSE(stream) < 0) { /* Must close even if fflush failed. */ |
| 54 | rv = EOF; |
| 55 | } |
| 56 | |
| 57 | stream->__filedes = -1; |
| 58 | |
| 59 | /* We need a way for freopen to know that a file has been closed. |
| 60 | * Since a file can't be both readonly and writeonly, that makes |
| 61 | * an effective signal. It also has the benefit of disabling |
| 62 | * transitions to either reading or writing. */ |
| 63 | #if defined(__UCLIBC_HAS_THREADS__) && defined(__STDIO_BUFFERS) |
| 64 | /* Before we mark the file as closed, make sure we increment the openlist use count |
| 65 | * so it isn't freed under us while still cleaning up. */ |
| 66 | __STDIO_OPENLIST_INC_USE; |
| 67 | #endif |
| 68 | stream->__modeflags &= (__FLAG_FREEBUF|__FLAG_FREEFILE); |
| 69 | stream->__modeflags |= (__FLAG_READONLY|__FLAG_WRITEONLY); |
| 70 | |
| 71 | #ifndef NDEBUG |
| 72 | __STDIO_STREAM_RESET_GCS(stream); |
| 73 | |
| 74 | /* Reinitialize everything (including putc since fflush could fail). */ |
| 75 | __STDIO_STREAM_DISABLE_GETC(stream); |
| 76 | __STDIO_STREAM_DISABLE_PUTC(stream); |
| 77 | __STDIO_STREAM_INIT_BUFREAD_BUFPOS(stream); |
| 78 | |
| 79 | # ifdef __UCLIBC_HAS_WCHAR__ |
| 80 | stream->__ungot_width[0] = 0; |
| 81 | # endif |
| 82 | # ifdef __STDIO_MBSTATE |
| 83 | __INIT_MBSTATE(&(stream->__state)); |
| 84 | # endif |
| 85 | #endif |
| 86 | |
| 87 | __STDIO_AUTO_THREADUNLOCK(stream); |
| 88 | |
| 89 | __STDIO_STREAM_FREE_BUFFER(stream); |
| 90 | #ifdef __UCLIBC_MJN3_ONLY__ |
| 91 | #warning REMINDER: inefficient - locks and unlocks twice and walks whole list |
| 92 | #endif |
| 93 | #if defined(__UCLIBC_HAS_THREADS__) && defined(__STDIO_BUFFERS) |
| 94 | /* inefficient - locks/unlocks twice and walks whole list */ |
| 95 | __STDIO_OPENLIST_INC_DEL_CNT; |
| 96 | __STDIO_OPENLIST_DEC_USE; /* This with free the file if necessary. */ |
| 97 | #else |
| 98 | __STDIO_STREAM_FREE_FILE(stream); |
| 99 | #endif |
| 100 | |
| 101 | return rv; |
| 102 | } |
| 103 | libc_hidden_def(fclose) |