If a thread is cancelled while it holds a mutex, other threads waiting for
the mutex will never be woken, even if destroying the mutex, thus
leading to a deadlock.

Better just make the thread loops have a proper exit case than risking
the tricky semantic of pthread_cancel.

See issue #8, https://github.com/espeak-ng/espeak-ng/issues/8

There might still be some ints that could be changed to boolean.

Possible regressions in fifo.c:
int fifo_is_busy() and int fifo_is_command_enabled() used to return an int. Now they return a boolean. This might cause problems on systems where stdbool true/false is something else than 1/0.

This is a partial fix for an audio regression. The other part of
the fix requires a change in pcaudiolib to reopen the audio device
on flush requests for affected audio drivers/devices.

This reverts commit f9ab812e00.

This restores the behaviour removed in commit
ca831d236a.

When using eSpeak for audio and eSpeak in a server, using the async
speech requests, that code stopped the audio as soon as possible
from a cancel request. This allows servers like brltty to be more
responsive.

This reverts commit 1b5ea47ea4.

This patch is causing lockups when using this with servers like brltty.

This allows process_espeak_command to stop as soon as possible

Using emacspeak server with espeak-ng (still not published) found that audio was only being stoped after a command is processed (i.e. using pcaudiolib).
This fixes this issue.

If a command ran to completion before the thread calling
fifo_add_command woke up, that thread would wait forever
for the command to start, never realizing that it had already
finished.

This is handled by calls to espeak_ng_Cancel/espeak_Cancel and
espeak_ng_Terminate/espeak_Terminate.

Removing these calls do not impact on the behaviour of the program
and simplify the wave.h API.

The debugging code is done inconsistently, mainly to trace the
event and audio output logic. This makes it harder to understand
the code flow for logic that is not enabled by default.

As such the debugging code makes the code harder to maintain.

This moves the libespeak source (*.cpp) files to src/libespeak-ng
and renames the C files (libespeak, espeak, speak) so they have
a .c file extension.

Program changes to enable audio output from Windows DLL.

Language changes: an, de, en, nl, ta.


git-svn-id: https://espeak.svn.sourceforge.net/svnroot/espeak/trunk@365 d46cf337-b52f-0410-862d-fd96e6ae7743

Change program code for espeak/libespeak to C, remove C++ features.

Language changes: af, ga, grc, hu, nl, sw, ta


git-svn-id: https://espeak.svn.sourceforge.net/svnroot/espeak/trunk@364 d46cf337-b52f-0410-862d-fd96e6ae7743

Add --version command-line option.

Allow hexadecimal numbers for UTF-8 bytes in rules in *_rules files.

wave_pulse.cpp, ensure wave_close is not called again while waiting.


git-svn-id: https://espeak.svn.sourceforge.net/svnroot/espeak/trunk@278 d46cf337-b52f-0410-862d-fd96e6ae7743

Fixed bug where SSML voice change didn't remember an initially specified Klatt variant.

Removed some unused variables and redundant initializations.

Patch to fix a spike from Klatt function setzeroabc()


git-svn-id: https://espeak.svn.sourceforge.net/svnroot/espeak/trunk@275 d46cf337-b52f-0410-862d-fd96e6ae7743