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I don't know why MAP_SHARED is needed, but it's not compatable with

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write-only mode, so make it part of snd_oss_rw
This commit is contained in:
Bill Currie 2003-04-30 02:52:41 +00:00
parent 09f3f1ea26
commit 95ae17acc1
1 changed files with 4 additions and 3 deletions
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7
libs/audio/targets/snd_oss.c
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@ -120,6 +120,7 @@ SNDDMA_Init (void)
int retries = 3;
int omode = O_WRONLY;
int mmmode = PROT_WRITE;
int mmflags = MAP_FILE;
struct audio_buf_info info;
snd_inited = 0;
@ -132,6 +133,7 @@ SNDDMA_Init (void)
if (snd_oss_rw->int_val) {
omode = O_RDWR;
mmmode |= PROT_READ;
mmflags |= MAP_SHARED;
}
audio_fd = open (snd_dev, omode);
@ -262,9 +264,8 @@ SNDDMA_Init (void)
}
if (mmaped_io) { // memory map the dma buffer
shm->buffer = (unsigned char *) mmap
(NULL, info.fragstotal * info.fragsize, mmmode,
MAP_FILE | MAP_SHARED, audio_fd, 0);
shm->buffer = (byte *) mmap (NULL, info.fragstotal * info.fragsize,
mmmode, mmflags, audio_fd, 0);
if (shm->buffer == MAP_FAILED) {
perror (snd_dev);
Sys_Printf ("Could not mmap %s\n", snd_dev);