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Commit 81cd0844 authored by Jack Palevich's avatar Jack Palevich
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Implement eglInitialize / eglTerminate reference counting 

Previously we imlpemented the standard semantics for
eglInitialize / eglTerminate, which are that
eglInitialize may be called any number of times,
but the first call to eglTerminate will terminate
the display.

Now we follow reference-countins semantics, which
means that eglTerminate will only terminate the
display when the reference count returns to zero.

This change allows EGL to be used by multiple
independently written modules in the same process.

(Otherwise there is no way for the independent
modules to coordinate their use of the display.)
parent 11ebca5b

opengl/libs/EGL/egl.cpp

+4 −1
Original line number Original line Diff line number Diff line
@@ -650,6 +650,7 @@ EGLBoolean eglInitialize(EGLDisplay dpy, EGLint *major, EGLint *minor) 
    if (dp->refs > 0) {

    if (dp->refs > 0) {

        if (major != NULL) *major = VERSION_MAJOR;

        if (major != NULL) *major = VERSION_MAJOR;

        if (minor != NULL) *minor = VERSION_MINOR;

        if (minor != NULL) *minor = VERSION_MINOR;

        dp->refs++;

        return EGL_TRUE;

        return EGL_TRUE;

    }

    }
@@ -755,8 +756,10 @@ EGLBoolean eglTerminate(EGLDisplay dpy) 
    }

    }





    // this is specific to Android, display termination is ref-counted.

    // this is specific to Android, display termination is ref-counted.

    if (dp->refs > 1)

    if (dp->refs > 1) {

        dp->refs--;

        return EGL_TRUE;

        return EGL_TRUE;

    }





    EGLBoolean res = EGL_FALSE;

    EGLBoolean res = EGL_FALSE;

    for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {

    for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {