diff options
Diffstat (limited to 'byterun/extern.c')
| -rw-r--r-- | byterun/extern.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/byterun/extern.c b/byterun/extern.c index d0c7c4c4fc..8ad3a76ef3 100644 --- a/byterun/extern.c +++ b/byterun/extern.c @@ -391,12 +391,18 @@ static long extern_value(value v, value flags) void output_val(struct channel *chan, value v, value flags) { long len; + char * block; + if (! channel_binary_mode(chan)) failwith("output_value: not a binary channel"); alloc_extern_block(); len = extern_value(v, flags); + /* During really_putblock, concurrent output_val operations can take + place (via signal handlers or context switching in systhreads), + and extern_block may change. So, save the pointer in a local variable. */ + block = extern_block; really_putblock(chan, extern_block, len); - stat_free(extern_block); + stat_free(block); } value output_value(value vchan, value v, value flags) /* ML */ |